cpu/x86/smm: Use PRIxPTR to print uintptr_t

Since 'base' is a uintptr_t, it needs the PRIxPTR format specifier. This
fixes a compilation error when targeting x86_64 or using Clang 9.0.0.

Change-Id: Ib806e2b3cbb255ef208b361744ac4547b8ba262f
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36785
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
diff --git a/src/cpu/x86/smm/tseg_region.c b/src/cpu/x86/smm/tseg_region.c
index a8b8bb7..5b5c572 100644
--- a/src/cpu/x86/smm/tseg_region.c
+++ b/src/cpu/x86/smm/tseg_region.c
@@ -17,6 +17,7 @@
 #include <cpu/x86/smm.h>
 #include <stage_cache.h>
 #include <types.h>
+#include <inttypes.h>
 
 /*
  *        Subregions within SMM
@@ -88,11 +89,11 @@
 		return;
 
 	printk(BIOS_DEBUG, "SMM Memory Map\n");
-	printk(BIOS_DEBUG, "SMRAM       : 0x%zx 0x%zx\n", base, size);
+	printk(BIOS_DEBUG, "SMRAM       : 0x%" PRIxPTR " 0x%zx\n", base, size);
 
 	for (i = 0; i < SMM_SUBREGION_NUM; i++) {
 		if (smm_subregion(i, &base, &size))
 			continue;
-		printk(BIOS_DEBUG, " Subregion %d: 0x%zx 0x%zx\n", i, base, size);
+		printk(BIOS_DEBUG, " Subregion %d: 0x%" PRIxPTR " 0x%zx\n", i, base, size);
 	}
 }