staging: brcm80211: fix 'uninitialized usage' compiler warning

Building for the ARM resulted in a compiler warning about usage of
a possibly uninitialized variable. The warning is valid and the
code has been fixed accordingly.
Reviewed-by: NPieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: NHenry Ptasinski <henryp@broadcom.com>
Signed-off-by: NArend van Spriel <arend@broadcom.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmsmac/channel.c

@@ -1279,8 +1279,8 @@ brcms_c_channel_reg_limits(struct brcms_cm_info *wlc_cm, u16 chanspec,
 	const struct country_info *country;
 	struct brcms_band *band;
 	const struct locale_info *li;
-	int conducted_max;
-	int conducted_ofdm_max;
+	int conducted_max = BRCMS_TXPWR_MAX;
+	int conducted_ofdm_max = BRCMS_TXPWR_MAX;
 	const struct locale_mimo_info *li_mimo;
 	int maxpwr20, maxpwr40;
 	int maxpwr_idx;