Add regprofile/zmm512-nooff.r2 for r2-ar-512bit-reg-fu-6412ef78

- 70 bytes, identical to regprofile/zmm512.r2 except bytes 65-66
- last line reads 'vec512\tzmm0\t.512\t? \t0'
- arp loads it without a parse error; 'ar zmm0' logs "Cannot retrieve reg 'zmm0' of 512 bits" and 'ar rip' prints 0x00000000

regprofile/zmm512-nooff.r2

@@ -0,0 +1,5 @@
+=PC	rip
+=SP	rsp
+gpr	rip	.64	0	0
+gpr	rsp	.64	8	0
+vec512	zmm0	.512	? 	0