lib: rsa: take spl/non-spl into account when building rsa_verify_with_pkey()

Right now in multiple places there are only checks for the full
CONFIG_RSA_VERIFY_WITH_PKEY option, not split into main,spl,tpl variants.

This breaks when the rsa functions get enabled for SPL, for example to
verify u-boot proper from spl.

So fix this by using the existing helpers to distinguis between
build-steps.
Signed-off-by: NHeiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

lib/rsa/Makefile

@@ -6,5 +6,5 @@
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
 obj-$(CONFIG_$(SPL_TPL_)RSA_VERIFY) += rsa-verify.o rsa-checksum.o
-obj-$(CONFIG_RSA_VERIFY_WITH_PKEY) += rsa-keyprop.o
+obj-$(CONFIG_$(SPL_TPL_)RSA_VERIFY_WITH_PKEY) += rsa-keyprop.o
 obj-$(CONFIG_RSA_SOFTWARE_EXP) += rsa-mod-exp.o

lib/rsa/rsa-verify.c

@@ -285,7 +285,7 @@ out:
 }
 #endif
 
-#if CONFIG_IS_ENABLED(FIT_SIGNATURE) || IS_ENABLED(CONFIG_RSA_VERIFY_WITH_PKEY)
+#if CONFIG_IS_ENABLED(FIT_SIGNATURE) || CONFIG_IS_ENABLED(RSA_VERIFY_WITH_PKEY)
 /**
  * rsa_verify_key() - Verify a signature against some data using RSA Key
  *
@@ -359,7 +359,7 @@ static int rsa_verify_key(struct image_sign_info *info,
 }
 #endif
 
-#ifdef CONFIG_RSA_VERIFY_WITH_PKEY
+#if CONFIG_IS_ENABLED(RSA_VERIFY_WITH_PKEY)
 /**
  * rsa_verify_with_pkey() - Verify a signature against some data using
  * only modulus and exponent as RSA key properties.
@@ -492,7 +492,7 @@ int rsa_verify(struct image_sign_info *info,
 		return -EINVAL;
 	}
 
-	if (IS_ENABLED(CONFIG_RSA_VERIFY_WITH_PKEY) && !info->fdt_blob) {
+	if (CONFIG_IS_ENABLED(RSA_VERIFY_WITH_PKEY) && !info->fdt_blob) {
 		/* don't rely on fdt properties */
 		ret = rsa_verify_with_pkey(info, hash, sig, sig_len);