Change in coreboot[master]: mb/google/dedede/var/drawcia: Add LTE modem support for drawper

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Tony Huang, Wisley Chen.
Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55181 )

Change subject: mb/google/dedede/var/drawcia: Add LTE modem support for drawper
......................................................................

Patch Set 3:

(2 comments)

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

https://review.coreboot.org/c/coreboot/+/55181/comment/5f7af907_07af0966 
PS3, Line 19: /* A10 : WWAN_EN */
            : 	PAD_CFG_GPO(GPP_A10, 1, PWROK),
            : 
            : 	/* B7  : PCIE_CLKREQ2_N ==> WWAN_SAR_DETECT_ODL*/
            : 	PAD_CFG_GPO(GPP_B7, 1, DEEP),
            : 
            : 	/* C12 : AP_PEN_DET_ODL has an external pull-up and hence no pad termination.*/
            : 	PAD_CFG_GPI_GPIO_DRIVER(GPP_C12, NONE, DEEP),
            : 
            : 	/* D0  : WWAN_HOST_WAKE ==> WWAN_WDISABLE_L */
            : 	PAD_CFG_GPO(GPP_D0, 1, DEEP),
            : 
            : 	/* H0 : WWAN_PERST */
            : 	PAD_CFG_GPO(GPP_H0, 0, PLTRST),
If this applies only for Drawper, then it is better to configure these gpios only for that using fw_config.

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

https://review.coreboot.org/c/coreboot/+/55181/comment/64d18d98_452a786d 
PS3, Line 146: chip drivers/usb/acpi
             : 						register "desc" = ""LTE""
             : 						register "type" = "UPC_TYPE_INTERNAL"
             : 						register "has_power_resource" = "1"
             : 						register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_H0)"
             : 						register "reset_off_delay_ms" = "20"
             : 						register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A10)"
             : 						register "enable_delay_ms" = "20"
             : 						device usb 2.3 on end
             : 					end
I am afraid this will always show as LTE in all Draw*.