fixup! non-upstream: support DS1 exit firmware re-download

* Fixes build with Clang.

drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c:461:10: error: array index 18 is past the end of the array (that has type 'u8[1]' (aka 'unsigned char[1]')) [-Werror,-Warray-bounds]
  461 |                 setbit(eventmask_msg->mask, BRCMF_E_ULP);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/wireless/broadcom/brcm80211/brcmfmac/../include/brcmu_utils.h:37:30: note: expanded from macro 'setbit'
   37 | #define setbit(a, i)    (((u8 *)a)[(i)/NBBY] |= 1<<((i)%NBBY))
      |                                 ^  ~~~~~~~~
drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.h:313:2: note: array 'mask' declared here
  313 |         u8      mask[1];
      |         ^
1 error generated.

Author: KonstaT

drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.h

@@ -310,7 +310,7 @@ struct eventmsgs_ext {
 	u8	command;
 	u8	len;
 	u8	maxgetsize;
-	u8	mask[1];
+	u8	mask[];
 };
 
 typedef int (*brcmf_fweh_handler_t)(struct brcmf_if *ifp,