Update config: enable dummy_hcd and gadgets, disable modules signing

We use dummy-hcd to have at least one USB controller in every VM - some
software expect to have it (lsusb for example, otherwise it crashes).
Gadgets are just an addition which can be used there for development
purposes.

Also disable modules signing as we don't use it.

config-pvops

@@ -308,15 +308,12 @@ CONFIG_MODULE_UNLOAD=y
 # CONFIG_MODULE_FORCE_UNLOAD is not set
 # CONFIG_MODVERSIONS is not set
 # CONFIG_MODULE_SRCVERSION_ALL is not set
-CONFIG_MODULE_SIG=y
-# CONFIG_MODULE_SIG_FORCE is not set
-CONFIG_MODULE_SIG_ALL=y
+# CONFIG_MODULE_SIG is not set
 # CONFIG_MODULE_SIG_SHA1 is not set
 # CONFIG_MODULE_SIG_SHA224 is not set
-CONFIG_MODULE_SIG_SHA256=y
+# CONFIG_MODULE_SIG_SHA256 is not set
 # CONFIG_MODULE_SIG_SHA384 is not set
 # CONFIG_MODULE_SIG_SHA512 is not set
-CONFIG_MODULE_SIG_HASH="sha256"
 # CONFIG_MODULE_COMPRESS is not set
 CONFIG_STOP_MACHINE=y
 CONFIG_BLOCK=y
@@ -4924,7 +4921,84 @@ CONFIG_USB_PHY=y
 CONFIG_NOP_USB_XCEIV=m
 # CONFIG_USB_GPIO_VBUS is not set
 # CONFIG_USB_ISP1301 is not set
-# CONFIG_USB_GADGET is not set
+CONFIG_USB_GADGET=m
+# CONFIG_USB_GADGET_DEBUG is not set
+# CONFIG_USB_GADGET_DEBUG_FILES is not set
+# CONFIG_USB_GADGET_DEBUG_FS is not set
+CONFIG_USB_GADGET_VBUS_DRAW=2
+CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS=2
+
+#
+# USB Peripheral Controller
+#
+# CONFIG_USB_FOTG210_UDC is not set
+# CONFIG_USB_GR_UDC is not set
+# CONFIG_USB_R8A66597 is not set
+# CONFIG_USB_PXA27X is not set
+# CONFIG_USB_MV_UDC is not set
+# CONFIG_USB_MV_U3D is not set
+# CONFIG_USB_M66592 is not set
+# CONFIG_USB_AMD5536UDC is not set
+# CONFIG_USB_NET2272 is not set
+# CONFIG_USB_NET2280 is not set
+# CONFIG_USB_GOKU is not set
+# CONFIG_USB_EG20T is not set
+CONFIG_USB_DUMMY_HCD=m
+CONFIG_USB_LIBCOMPOSITE=m
+CONFIG_USB_F_ACM=m
+CONFIG_USB_F_SS_LB=m
+CONFIG_USB_U_SERIAL=m
+CONFIG_USB_U_ETHER=m
+CONFIG_USB_F_SERIAL=m
+CONFIG_USB_F_OBEX=m
+CONFIG_USB_F_NCM=m
+CONFIG_USB_F_ECM=m
+CONFIG_USB_F_EEM=m
+CONFIG_USB_F_SUBSET=m
+CONFIG_USB_F_RNDIS=m
+CONFIG_USB_F_MASS_STORAGE=m
+CONFIG_USB_F_FS=m
+CONFIG_USB_F_UAC2=m
+CONFIG_USB_F_UVC=m
+CONFIG_USB_CONFIGFS=m
+CONFIG_USB_CONFIGFS_SERIAL=y
+CONFIG_USB_CONFIGFS_ACM=y
+CONFIG_USB_CONFIGFS_OBEX=y
+CONFIG_USB_CONFIGFS_NCM=y
+CONFIG_USB_CONFIGFS_ECM=y
+CONFIG_USB_CONFIGFS_ECM_SUBSET=y
+CONFIG_USB_CONFIGFS_RNDIS=y
+CONFIG_USB_CONFIGFS_EEM=y
+CONFIG_USB_CONFIGFS_MASS_STORAGE=y
+CONFIG_USB_CONFIGFS_F_LB_SS=y
+CONFIG_USB_CONFIGFS_F_FS=y
+# CONFIG_USB_ZERO is not set
+CONFIG_USB_AUDIO=m
+# CONFIG_GADGET_UAC1 is not set
+CONFIG_USB_ETH=m
+CONFIG_USB_ETH_RNDIS=y
+# CONFIG_USB_ETH_EEM is not set
+CONFIG_USB_G_NCM=m
+CONFIG_USB_GADGETFS=m
+CONFIG_USB_FUNCTIONFS=m
+# CONFIG_USB_FUNCTIONFS_ETH is not set
+# CONFIG_USB_FUNCTIONFS_RNDIS is not set
+CONFIG_USB_FUNCTIONFS_GENERIC=y
+CONFIG_USB_MASS_STORAGE=m
+CONFIG_USB_GADGET_TARGET=m
+CONFIG_USB_G_SERIAL=m
+CONFIG_USB_MIDI_GADGET=m
+CONFIG_USB_G_PRINTER=m
+CONFIG_USB_CDC_COMPOSITE=m
+CONFIG_USB_G_ACM_MS=m
+CONFIG_USB_G_MULTI=m
+CONFIG_USB_G_MULTI_RNDIS=y
+# CONFIG_USB_G_MULTI_CDC is not set
+CONFIG_USB_G_HID=m
+CONFIG_USB_G_DBGP=m
+# CONFIG_USB_G_DBGP_PRINTK is not set
+CONFIG_USB_G_DBGP_SERIAL=y
+CONFIG_USB_G_WEBCAM=m
 CONFIG_USB_LED_TRIG=y
 CONFIG_UWB=m
 CONFIG_UWB_HWA=m
@@ -6239,7 +6313,6 @@ CONFIG_CRYPTO=y
 #
 # Crypto core or helper
 #
-CONFIG_CRYPTO_FIPS=y
 CONFIG_CRYPTO_ALGAPI=y
 CONFIG_CRYPTO_ALGAPI2=y
 CONFIG_CRYPTO_AEAD=y