The current pin muxing scheme muxes GPIO_1 pad for USB_OTG_ID
because of which when card is inserted, usb otg is enumerated
and the card is never detected.

[   64.492645] cfg80211: failed to load regulatory.db
[   64.492657] imx-sdma 20ec000.sdma: external firmware not found, using ROM firmware
[   76.343711] ci_hdrc ci_hdrc.0: EHCI Host Controller
[   76.349742] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 2
[   76.388862] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[   76.396650] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.08
[   76.405412] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[   76.412763] usb usb2: Product: EHCI Host Controller
[   76.417666] usb usb2: Manufacturer: Linux 5.8.0-rc1-next-20200618 ehci_hcd
[   76.424623] usb usb2: SerialNumber: ci_hdrc.0
[   76.431755] hub 2-0:1.0: USB hub found
[   76.435862] hub 2-0:1.0: 1 port detected

The TRM mentions GPIO_1 pad should be muxed/assigned for card detect
and ENET_RX_ER pad for USB_OTG_ID for proper operation.

This patch fixes pin muxing as per TRM and is tested on a
i.Core 1.5 MX6 DL SOM.

[   22.449165] mmc0: host does not support reading read-only switch, assuming write-enable
[   22.459992] mmc0: new high speed SDHC card at address 0001
[   22.469725] mmcblk0: mmc0:0001 EB1QT 29.8 GiB
[   22.478856]  mmcblk0: p1 p2

Fixes: 6df11287 ("ARM: dts: imx6q: Add Engicam i.CoreM6 Quad/Dual initial support")
Cc: stable@vger.kernel.org
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Suniel Mahesh <sunil@amarulasolutions.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>