rtl8723au: Replace u1Byte with u8

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
rtl8723au: Replace u2Byte with u16

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
rtl8723au: Replace u4Byte with u32

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
rtl8723au: Replace u8Byte with u64

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
rtl8723au: Replace s4Byte with s32

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
rtl8723au: Replace s1Byte with s8

The unused s2Byte is also deleted.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>