EDAC/amd64: Shut up an -Werror,-Wsometimes-uninitialized clang false positive

Reportedly, clang cannot do interprocedural analysis:

  https://lore.kernel.org/r/20230213-amd64_edac-wsometimes-uninitialized-v1-1-5bde32b89e02@kernel.org

and see that those arguments won't be used uninitialized.

So, yeah, the code's fine even without this. Normally, such a "fix"
won't be applied but that warning gets automatically enabled in -Wall
builds and when CONFIG_WERROR is set in allmodconfig builds, the build
fails.

So shut it up with a minimal fix as this code will see more
reorganization very soon.

  [ bp: Write commit message. ]
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/Y%2BqdVHidnrrKvxiD@dev-arch.thelio-3990X

drivers/edac/amd64_edac.c

@@ -3928,7 +3928,7 @@ static const struct attribute_group *amd64_edac_attr_groups[] = {
 
 static int hw_info_get(struct amd64_pvt *pvt)
 {
-	u16 pci_id1, pci_id2;
+	u16 pci_id1 = 0, pci_id2 = 0;
 	int ret;
 
 	if (pvt->fam >= 0x17) {