fix(crypto): use logical instead of bitwise operator

Discovered via clang-14 warnings for -Wbitwise-instead-of-logical
Closes https://github.com/satoshilabs/trezor-firmware/issues/129

crypto/bignum.c

@@ -271,7 +271,7 @@ int bn_is_equal(const bignum256 *x, const bignum256 *y) {
 //   &truecase == &falsecase or &res == &truecase == &falsecase
 void bn_cmov(bignum256 *res, volatile uint32_t cond, const bignum256 *truecase,
              const bignum256 *falsecase) {
-  assert((cond == 1) | (cond == 0));
+  assert((cond == 1) || (cond == 0));
 
   uint32_t tmask = -cond;   // tmask = 0xFFFFFFFF if cond else 0x00000000
   uint32_t fmask = ~tmask;  // fmask = 0x00000000 if cond else 0xFFFFFFFF
@@ -290,7 +290,7 @@ void bn_cmov(bignum256 *res, volatile uint32_t cond, const bignum256 *truecase,
 // Assumes prime is normalized and
 //   0 < prime < 2**260 == 2**(BITS_PER_LIMB * LIMBS - 1)
 void bn_cnegate(volatile uint32_t cond, bignum256 *x, const bignum256 *prime) {
-  assert((cond == 1) | (cond == 0));
+  assert((cond == 1) || (cond == 0));
 
   uint32_t tmask = -cond;   // tmask = 0xFFFFFFFF if cond else 0x00000000
   uint32_t fmask = ~tmask;  // fmask = 0x00000000 if cond else 0xFFFFFFFF