arm64: dts: ti: k3-am62*: Move eMMC pinmux to top level board file

arm64: dts: ti: k3-am62*: Move eMMC pinmux to top level board file

This moves pinmux child nodes for sdhci0 node from k3-am62x-sk-common
to each top level board file. This is needed since we require internal
pullups for AM62x SK and not for AM62 LP SK since it has external
pullups on DATA 1-7.

Internal pulls are required for AM62 SK as per JESD84 spec
recommendation to prevent unconnected lines floating.

Fixes: d19a66ae488a ("arm64: dts: ti: k3-am625-sk: Enable on board peripherals")
Cc: stable@vger.kernel.org
Signed-off-by: Judith Mendez <jm@ti.com>
Link: https://lore.kernel.org/r/20250707190830.3951619-1-jm@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>