config: disable userspace helper for firmware loader

This isn't needed for standard firmware locations. Furthermore
systemd-udev ignore such requests, so it causes 30s delay (timeouts).

config-pvops

@@ -1402,7 +1402,7 @@ CONFIG_PREVENT_FIRMWARE_BUILD=y
 CONFIG_FW_LOADER=y
 # CONFIG_FIRMWARE_IN_KERNEL is not set
 CONFIG_EXTRA_FIRMWARE=""
-CONFIG_FW_LOADER_USER_HELPER=y
+# CONFIG_FW_LOADER_USER_HELPER is not set
 # CONFIG_DEBUG_DRIVER is not set
 # CONFIG_DEBUG_DEVRES is not set
 CONFIG_SYS_HYPERVISOR=y
@@ -5726,7 +5726,7 @@ CONFIG_SERIAL_IPOCTAL=m
 CONFIG_EDD=m
 # CONFIG_EDD_OFF is not set
 CONFIG_FIRMWARE_MEMMAP=y
-CONFIG_DELL_RBU=m
+# CONFIG_DELL_RBU is not set
 CONFIG_DCDBAS=m
 CONFIG_DMIID=y
 CONFIG_DMI_SYSFS=m