[TA-100] Fix build breakage on TA100 builds

- atmel.c: restore the closing #endif for the outer
  WOLFSSL_ATMEL/ATECC/TA100 block. The previous "duplicate
  ATCA_TFLEX_SUPPORT" cleanup removed the real closer because the
  trailing-comment was misleading, leaving the file with an
  unterminated #if from line 35.
- ecc.c: drop !defined(WOLFSSL_MICROCHIP_TA100) from the guard around
  wc_ecc_point_is_at_infinity. The function is generic
  (mp_iszero(x) && mp_iszero(y)) and call sites in
  _ecc_import_x963_ex2 and friends don't exclude TA100, so the
  TA100 build was failing to link.

Author: danielinux

wolfcrypt/src/ecc.c

@@ -5302,7 +5302,6 @@ int wc_ecc_point_is_on_curve(ecc_point *p, int curve_idx)
 }
 
 #if !defined(WOLFSSL_ATECC508A) && !defined(WOLFSSL_ATECC608A) && \
-    !defined(WOLFSSL_MICROCHIP_TA100) && \
     !defined(WOLFSSL_CRYPTOCELL) && \
     (!defined(WOLF_CRYPTO_CB_ONLY_ECC) || defined(WOLFSSL_QNX_CAAM) || \
       defined(WOLFSSL_IMXRT1170_CAAM))

wolfcrypt/src/port/atmel/atmel.c

@@ -2031,3 +2031,6 @@ int wc_Microchip_AesGcmDecrypt(Aes* aes, byte* out, const byte* in, word32 sz,
                                    authTagSz, authIn, authInSz, AES_DECRYPTION);
 }
 #endif /* WOLFSSL_MICROCHIP_TA100 && !NO_AES && HAVE_AESGCM */
+
+#endif /* WOLFSSL_ATMEL || WOLFSSL_ATECC508A || WOLFSSL_ATECC608A ||
+        * WOLFSSL_ATECC_PKCB || WOLFSSL_MICROCHIP_TA100 */