Staging: rtl8188eu: rf_cfg: Remove useless cast

Type conversion of variables can be done by compiler implicitly so,
explicit conversions should be removed.
Semantic patch used:
@@
type T;
T e;
identifier x;
@@

* T x = (T)e;

Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com>
Reviewed-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/hal/rf_cfg.c

@@ -188,7 +188,7 @@ static void rtl8188e_config_rf_reg(struct adapter *adapt,
 	u32 addr, u32 data)
 {
 	u32 content = 0x1000; /*RF Content: radio_a_txt*/
-	u32 maskforphyset = (u32)(content & 0xE000);
+	u32 maskforphyset = content & 0xE000;
 
 	rtl_rfreg_delay(adapt, RF90_PATH_A, addr | maskforphyset,
 			RFREG_OFFSET_MASK,