staging: rtl8192u: make read-only array EWC11NHTCap static const

Don't populate the read-only array EWC11NHTCap on the stack but instead
make it static const. Also makes the object code a little smaller.
Remove comment.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220414103650.297396-1-colin.i.king@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/rtl819x_HTProc.c

@@ -480,7 +480,7 @@ void HTConstructCapabilityElement(struct ieee80211_device *ieee, u8 *posHTCap, u
 	}
 	memset(posHTCap, 0, *len);
 	if (pHT->ePeerHTSpecVer == HT_SPEC_VER_EWC) {
-		u8	EWC11NHTCap[] = {0x00, 0x90, 0x4c, 0x33};	// For 11n EWC definition, 2007.07.17, by Emily
+		static const u8	EWC11NHTCap[] = {0x00, 0x90, 0x4c, 0x33};
 
 		memcpy(posHTCap, EWC11NHTCap, sizeof(EWC11NHTCap));
 		pCapELE = (struct ht_capability_ele *)&posHTCap[4];