staging: rtl8188eu: make two arrays static const, makes object smaller

staging: rtl8188eu: make two arrays static const, makes object smaller

Don't populate two arrays on the stack but instead make them
static const. Makes the object code smaller by 49 bytes.

Before:
   text	   data	    bss	    dec	    hex	filename
  26821	   5616	      0	  32437	   7eb5	rtl8188eu/core/rtw_ieee80211.o

After:
   text	   data	    bss	    dec	    hex	filename
  26612	   5776	      0	  32388	   7e84	rtl8188eu/core/rtw_ieee80211.o

(gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20190906173949.21860-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>