Fix CPER generation of ASCII properties

If FRU string and CPU brand string are not ascii, they would be
generated as non UTF-8 entities, causing json parsers like nlohmann to
fail.

These properties are defined as ASCII in the UEFI 2.10 spec.

Change-Id: Iba8056bf9855c5bcf07e0267efe47fb17da245a7
Signed-off-by: Aushim Nagarkatti <anagarkatti@nvidia.com>
diff --git a/generator/cper-generate.c b/generator/cper-generate.c
index 91eaf41..7b60848 100644
--- a/generator/cper-generate.c
+++ b/generator/cper-generate.c
@@ -146,9 +146,8 @@
 
 	//Ensure the FRU text is not null terminated early.
 	for (int i = 0; i < 20; i++) {
-		if (descriptor->FruString[i] == 0x0) {
-			descriptor->FruString[i] = rand() % 127 + 1;
-		}
+		// FRU string can only be ASCII
+		descriptor->FruString[i] = rand() % 127 + 1;
 
 		//Null terminate last byte.
 		if (i == 19) {
diff --git a/generator/sections/gen-section-generic.c b/generator/sections/gen-section-generic.c
index 41c315f..7baf325 100644
--- a/generator/sections/gen-section-generic.c
+++ b/generator/sections/gen-section-generic.c
@@ -25,9 +25,8 @@
 	//Ensure CPU brand string does not terminate early.
 	for (int i = 0; i < 128; i++) {
 		UINT8 *byte = start_byte + 24 + i;
-		if (*byte == 0x0) {
-			*byte = rand() % 127 + 1;
-		}
+		//CPU brand can only be ASCII
+		*byte = rand() % 127 + 1;
 
 		//Null terminate last byte.
 		if (i == 127) {