ath5k: update AR5K_PHY_RESTART_DIV_GC values to match masks

#define AR5K_PHY_RESTART_DIV_GC               0x001c0000
is 3 bit wide.

The previous values of 0xc and 0x8 are 4bit wide and bigger than the mask.

Writing 0 and 1 to AR5K_PHY_RESTART_DIV_GC is consistent with the comments and
initvals we have in the HAL.
Signed-off-by: NBruno Randolf <br1@einfach.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/phy.c

@@ -1768,13 +1768,13 @@ ath5k_hw_set_fast_div(struct ath5k_hw *ah, u8 ee_mode, bool enable)
 
 	if (enable) {
 		AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
-				AR5K_PHY_RESTART_DIV_GC, 0xc);
+				AR5K_PHY_RESTART_DIV_GC, 1);
 
 		AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
 					AR5K_PHY_FAST_ANT_DIV_EN);
 	} else {
 		AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
-				AR5K_PHY_RESTART_DIV_GC, 0x8);
+				AR5K_PHY_RESTART_DIV_GC, 0);
 
 		AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
 					AR5K_PHY_FAST_ANT_DIV_EN);