soc/amd/stoneyridge/cpu: use MSR_PSP_ADDR define instead of hex number

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Id9042def0f5e9d2fa994d6729c592c7e2152976b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50405
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
diff --git a/src/soc/amd/stoneyridge/cpu.c b/src/soc/amd/stoneyridge/cpu.c
index c898ff7..9992fc5 100644
--- a/src/soc/amd/stoneyridge/cpu.c
+++ b/src/soc/amd/stoneyridge/cpu.c
@@ -16,6 +16,7 @@
 #include <soc/smi.h>
 #include <soc/iomap.h>
 #include <console/console.h>
+#include <amdblocks/psp.h>
 
 /*
  * MP and SMM loading initialization.
@@ -121,10 +122,10 @@
 	uint32_t psp_bar; /* Note: NDA BKDG names this 32-bit register BAR3 */
 	psp_bar = pci_read_config32(SOC_PSP_DEV, PCI_BASE_ADDRESS_4);
 	psp_bar &= ~PCI_BASE_ADDRESS_MEM_ATTR_MASK;
-	psp_msr = rdmsr(0xc00110a2);
+	psp_msr = rdmsr(MSR_PSP_ADDR);
 	if (psp_msr.lo == 0) {
 		psp_msr.lo = psp_bar;
-		wrmsr(0xc00110a2, psp_msr);
+		wrmsr(MSR_PSP_ADDR, psp_msr);
 	}
 }