fragments: adopt master's lpc55s69 macro consolidation

Master (PR #773) consolidated WOLFSSL_NXP_LPC55S69_WITH_HWACCEL and
WOLFSSL_NXP_LPC55S69_NO_HWACCEL into a single WOLFSSL_NXP_LPC55S6X
hwaccel flag, switched the test/bench HASHDRBG and HW-feature gates to
TARGET_lpc55s69 (covers both hwaccel and non-hwaccel builds), and
dropped the NO_WOLFSSL_SHA256_INTERLEAVE workaround. Propagate those
changes into the new include/user_settings/ fragments so the old macro
names (which no longer exist in arch.mk/test-app/hal) don't leave the
test/bench and NEEDS_HASHDRBG paths permanently disabled on lpc55s69.

Author: bigbrett

include/user_settings/cascade.h

@@ -108,8 +108,7 @@
 #if defined(WOLFBOOT_TPM_PARMENC)  || \
     defined(WOLFCRYPT_SECURE_MODE) || \
     ((defined(WOLFCRYPT_TEST) || defined(WOLFCRYPT_BENCHMARK)) && \
-     (defined(WOLFSSL_NXP_LPC55S69_WITH_HWACCEL) || \
-      defined(WOLFSSL_NXP_LPC55S69_NO_HWACCEL)))
+     defined(TARGET_lpc55s69))
 #  ifndef WOLFBOOT_NEEDS_HASHDRBG
 #    define WOLFBOOT_NEEDS_HASHDRBG
 #  endif

include/user_settings/test_bench.h

@@ -27,10 +27,6 @@
 #define _WOLFBOOT_USER_SETTINGS_TEST_BENCH_H_
 
 #ifdef WOLFCRYPT_TEST
-#  ifdef WOLFSSL_NXP_LPC55S69_WITH_HWACCEL
-     /* lpc55s69 hashcrypt hw does not support interleaving */
-#    define NO_WOLFSSL_SHA256_INTERLEAVE
-#  endif
    /* Skip extended tests to save memory */
 #  define NO_CRYPT_TEST_EXTENDED
    /* Use smaller certificate buffers */
@@ -82,8 +78,7 @@
     * finalize.h's chain-1 else branch. */
 #  define HAVE_AESGCM
 #  define GCM_TABLE
-#  if defined(WOLFSSL_NXP_LPC55S69_WITH_HWACCEL) \
-        || defined(WOLFSSL_NXP_LPC55S69_NO_HWACCEL)
+#  ifdef TARGET_lpc55s69
      /* LPC55S69 path uses real RNG hardware for the seed and HASHDRBG
       * for generation. NEEDS_HASHDRBG is declared in cascade.h on this
       * combination, so finalize.h emits HAVE_HASHDRBG. */