staging: rtl8192u: Convert u4bAcParam to little-endian

The commit 9304b5b0 ("staging: rtl8192u: Fix sparse warnings in r8192U_dm.c")
adds casting of le16 from cpu endianness. Therefore constructing
u4bAcParam potentially using big-endian order.
This patch converts the u4bAcParam parameter back to little-endian after
it has been constructed. Hence on big-endian architectures the parameter
will remain as little-endian.
Signed-off-by: Tuomo Rinne <tuomo.rinne@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/r8192U_dm.c

@@ -2321,6 +2321,7 @@ static void dm_check_edca_turbo(
 			u1bAIFS  <<= AC_PARAM_AIFS_OFFSET;
 
 			u4bAcParam = op_limit | cw_max | cw_min | u1bAIFS;
+			cpu_to_le32s(&u4bAcParam);
 
 			write_nic_dword(dev, EDCAPARA_BE, u4bAcParam);