Hexagon: add support for additional exceptions

Add multi-reg-write and unaligned-PC exceptions.

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
diff --git a/arch/hexagon/kernel/traps.c b/arch/hexagon/kernel/traps.c
index d59ee62..12164a3 100644
--- a/arch/hexagon/kernel/traps.c
+++ b/arch/hexagon/kernel/traps.c
@@ -65,6 +65,10 @@
 		return "Write protection fault";
 	case HVM_GE_C_XMAL:
 		return "Misaligned instruction";
+	case HVM_GE_C_WREG:
+		return "Multiple writes to same register in packet";
+	case HVM_GE_C_PCAL:
+		return "Program counter values that are not properly aligned";
 	case HVM_GE_C_RMAL:
 		return "Misaligned data load";
 	case HVM_GE_C_WMAL:
@@ -324,6 +328,12 @@
 	case HVM_GE_C_XMAL:
 		misaligned_instruction(regs);
 		break;
+	case HVM_GE_C_WREG:
+		illegal_instruction(regs);
+		break;
+	case HVM_GE_C_PCAL:
+		misaligned_instruction(regs);
+		break;
 	case HVM_GE_C_RMAL:
 		misaligned_data_load(regs);
 		break;