staging: wlan-ng: use GENMASK macro in define of p80211netdev.h

This patch replace actual mask stuff using BIT macros with
or operators to make use of GENMASK macro which simplifies
code clearity and readibility.

It applies for defines included in p80211netdev.h header file.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/p80211netdev.h

@@ -143,7 +143,7 @@ extern struct iw_handler_def p80211wext_handler_def;
 #define NUM_WEPKEYS 4
 #define MAX_KEYLEN 32
 
-#define HOSTWEP_DEFAULTKEY_MASK (BIT(1) | BIT(0))
+#define HOSTWEP_DEFAULTKEY_MASK GENMASK(1, 0)
 #define HOSTWEP_SHAREDKEY BIT(3)
 #define HOSTWEP_DECRYPT  BIT(4)
 #define HOSTWEP_ENCRYPT  BIT(5)