[M] Change in coreboot[master]: mb/google/geralt: Add power on sequence for BOE_TV110C9M_LL0

[Rex-BC Chen (Code Review)]

Attention is currently required from: Hung-Te Lin, Liju-Clr Chen, Yu-Ping Wu, Yidi Lin.

Rex-BC Chen has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/72749 )

Change subject: mb/google/geralt: Add power on sequence for BOE_TV110C9M_LL0
......................................................................

Patch Set 1:

(6 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/72749/comment/8add608c_3f64d5c6 
PS1, Line 7: power on 
power-on

https://review.coreboot.org/c/coreboot/+/72749/comment/2b2da857_aa52be5d 
PS1, Line 9: Add power sequence to power on BOE_TV110C9M_LL0 on Geralt proto board.
For Geralt, we use BOE_TV110C9M_LL0 as mipi firmware display, so
add the power-on sequence for BOE_TV110C9M_LL0.

https://review.coreboot.org/c/coreboot/+/72749/comment/00d9c472_adfcb342 
PS1, Line 12: on Geralt proto
            : board
on Geralt.

File src/mainboard/google/geralt/panel_geralt.c:

https://review.coreboot.org/c/coreboot/+/72749/comment/7191e4e7_d4fa49de 
PS1, Line 22: static int mipi_panel_reg_mask (u8 addr, u8 val, u8 mask)
move to panel.c.

https://review.coreboot.org/c/coreboot/+/72749/comment/3c08bda8_bea6a578 
PS1, Line 26: if (i2c_read_field(MIPI_PANEL_I2C, MIPI_PANEL_SLAVE, addr, &msg, 0xFF, 0))
            : 		printk(BIOS_ERR, "Rex: failed to read i2c: %d\n", addr);
`
if (i2c_read_field(MIPI_PANEL_I2C, MIPI_PANEL_SLAVE, addr, &msg, 0xFF, 0)) {
    printk(BIOS_ERR, "Failed to read i2c: %d\n", addr);
    return -1;
}
`

https://review.coreboot.org/c/coreboot/+/72749/comment/c20e2189_093937b9 
PS1, Line 66: 	ret = mipi_panel_reg_mask(0x00, 0x11, 0x1F);
            : 
            : 	/* Set AVEE = -5.7V */
            : 	ret = mipi_panel_reg_mask(0x01, 0x11, 0x1F);
            : 
            : 	/* Disable AVDD & AVEE discharge when power on*/
            : 	ret = mipi_panel_reg_mask(0x03, 0x30, 0xFF);
do some error handling