einj_mem_uc: support error injection on AMD EPYC platform

AMD EPYC CPUs also support APEI EINJ error injection. Tested on AMD Milan
and Genoa.

Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/einj_mem_uc.c b/einj_mem_uc.c
index 16df329..279fd11 100644
--- a/einj_mem_uc.c
+++ b/einj_mem_uc.c
@@ -244,6 +244,11 @@
 		return 1;
 	if (strstr(model, "Gold"))
 		return 1;
+
+	/* AMD EPYC, e.g. Milan, Genoa */
+	if (strstr(model, "EPYC"))
+		return 1;
+
 	return 0;
 }