staging: rtl8712: remove redundant zero assignment to val32

Variable val32 is being assigned a zero value that is never read
since val32 is being updated immediately afterwards. Remove this
redundant assignment, cleans up clang warning:

drivers/staging/rtl8712/hal_init.c:339:2: warning: Value stored
to 'val32' is never read

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rtl8712/hal_init.c

···
 		    r8712_read32(padapter, RCR));
 	val32 = r8712_read32(padapter, RCR);
 	r8712_write32(padapter, RCR, (val32 | BIT(25))); /* Append PHY status */
-	val32 = 0;
 	val32 = r8712_read32(padapter, 0x10250040);
 	r8712_write32(padapter,  0x10250040, (val32 & 0x00FFFFFF));
 	/* for usb rx aggregation */