hw/block/pflash_cfi02: Split if() condition

Split the if() condition check and arrange the indentation to
ease the review of the next patches. No logical change.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20190627202719.17739-21-philmd@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>

hw/block/pflash_cfi02.c

@@ -309,8 +309,10 @@ static void pflash_write(void *opaque, hwaddr offset, uint64_t value,
 
     trace_pflash_io_write(offset, width, width << 1, value, pfl->wcycle);
     cmd = value;
-    if (pfl->cmd != 0xA0 && cmd == 0xF0) {
-        goto reset_flash;
+    if (pfl->cmd != 0xA0) {
+        if (cmd == 0xF0) {
+            goto reset_flash;
+        }
     }
     offset &= pfl->chip_len - 1;