imx: imx6ull: fix pinmux sel_input value for uart5 pins

sel_input value for the following uart5 pins is
different between i.MX6UL and i.MX6ULL:

MX6_PAD_UART5_TX_DATA__UART5_DTE_RX
MX6_PAD_UART5_RX_DATA__UART5_DCE_RX
MX6_PAD_ENET1_RX_EN__UART5_DCE_RTS
MX6_PAD_ENET1_TX_DATA0__UART5_DTE_RTS
MX6_PAD_CSI_DATA02__UART5_DCE_RTS

As sel_input value for the second one is fixed by
the previous commit, fix the rest.

Signed-off-by: Yuichiro Goto <goto@k-tech.co.jp>