8178033: C1 crashes with -XX:UseAVX = 3: "not a mov [reg+offs], reg instruction"

Skip the EVEX prefix such that the instruction address points to the prefixed opcode.

Reviewed-by: kvn, mcberg

hotspot/src/cpu/x86/vm/nativeInst_x86.hpp

@@ -356,6 +356,7 @@ class NativeMovRegMem: public NativeInstruction {
 
     instruction_VEX_prefix_2bytes       = Assembler::VEX_2bytes,
     instruction_VEX_prefix_3bytes       = Assembler::VEX_3bytes,
+    instruction_EVEX_prefix_4bytes      = Assembler::EVEX_4bytes,
 
     instruction_size                    = 4,
     instruction_offset                  = 0,