freedreno/a2xx: Fix compiler warning in disasm.

warning: converting a packed ‘instr_cf_t’ {aka ‘union <anonymous>’}
pointer (alignment 1) to a ‘uint16_t’ {aka ‘short unsigned int’} pointer
(alignment 2) may result in an unaligned pointer value
[-Waddress-of-packed-member]

We may know that we'll only ever have aligned instr_cf_ts, but gcc
doesn't.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5955>

src/gallium/drivers/freedreno/a2xx/disasm-a2xx.c

@@ -576,7 +576,8 @@ static void print_cf(instr_cf_t *cf, int level)
 {
 	printf("%s", levels[level]);
 	if (debug & PRINT_RAW) {
-		uint16_t *words = (uint16_t *)cf;
+		uint16_t words[3];
+		memcpy(&words, cf, sizeof(words));
 		printf("    %04x %04x %04x            \t",
 				words[0], words[1], words[2]);
 	}