Change in coreboot[master]: mb/google/dedede/var/blipper: Update devicetree and gpio setting

[zanxi chen (Code Review)]

Attention is currently required from: Ben Kao, Karthik Ramasubramanian.
zanxi chen has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55385 )

Change subject: mb/google/dedede/var/blipper: Update devicetree and gpio setting
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Patch Set 2:

(5 comments)

File src/mainboard/google/dedede/variants/blipper/gpio.c:

https://review.coreboot.org/c/coreboot/+/55385/comment/04452833_f8adb995 
PS1, Line 9: static const struct pad_config gpio_table[] = {
> if no WWAN, we can set WWAN related pins to NC. […]

1.Done. WWAN related pins that not been closed in baseboard have been all closed.
2.UART2_RTS_N and UART2_CTS_N have been closed in the baseboard.
3.Done.
4.GP_E00 is used by ucam.

https://review.coreboot.org/c/coreboot/+/55385/comment/b667eced_f49ed8e0 
PS1, Line 22: /* G7  : SD_SDIO_WP */
            : 	PAD_NC(GPP_G7, NONE),
> if GPP_G7 is set to NC, it will have SD card detection issue, please remove it.

Done

File src/mainboard/google/dedede/variants/blipper/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/55385/comment/9d869524_50b4f893 
PS1, Line 25: 		.i2c[1] = {
            : 			.speed = I2C_SPEED_FAST,
            : 		},
> You can remove it if you don't use it anymore.

Done

https://review.coreboot.org/c/coreboot/+/55385/comment/047b8825_f7777801 
PS1, Line 31: 		.i2c[3] = {
            : 			.speed = I2C_SPEED_FAST,
            : 		},
> You can remove it if you don't use it anymore.

Done

https://review.coreboot.org/c/coreboot/+/55385/comment/5f2410db_a75e11d8 
PS1, Line 61: register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_D13)"
> What's the purpose? It may delay the enabling of the USB camera during system startup, you can remov […]

Done