arm64: dts: imx8mm: Fix pad control for UART1_DTE_RX

stable inclusion
from stable-v5.10.168
commit 8c6b46d426ed9138a6a7fe9fb5b27df5a8ec7c74
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7URR4

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8c6b46d426ed9138a6a7fe9fb5b27df5a8ec7c74



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[ Upstream commit 47123900 ]

According section
    8.2.5.313 Select Input Register (IOMUXC_UART1_RXD_SELECT_INPUT)
of 
    i.MX 8M Mini Applications Processor Reference Manual, Rev. 3, 11/2020
the required setting for this specific pin configuration is "1"

Signed-off-by: Pierluigi Passaro <pierluigi.p@variscite.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Fixes: c1c9d413 ("dt-bindings: imx: Add pinctrl binding doc for imx8mm")
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: zhaoxiaoqiang11 <zhaoxiaoqiang11@jd.com>