soc/amd/picasso,stoneyridge/mca: mark num_banks as constant

Change-Id: I23aa4d36d4e6d4c7ed66800c2e7963c4ed03c393
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56236
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/picasso/mca.c

@@ -154,9 +154,7 @@ void check_mca(void)
 {
 	int i;
 	struct mca_bank mci;
-	unsigned int num_banks;
+	const unsigned int num_banks = mca_get_bank_count();
-
-	num_banks = mca_get_bank_count();
 
 	for (i = 0 ; i < num_banks ; i++) {
 		mci.sts = rdmsr(MCAX_STATUS_MSR(i));

src/soc/amd/stoneyridge/mca.c

@@ -153,9 +153,7 @@ void check_mca(void)
 {
 	int i;
 	struct mca_bank mci;
-	unsigned int num_banks;
+	const unsigned int num_banks = mca_get_bank_count();
-
-	num_banks = mca_get_bank_count();
 
 	if (is_warm_reset()) {
 		for (i = 0 ; i < num_banks ; i++) {