mb/system76/oryp6: Enable TAS5825M smart amp

Allows using the internal speakers of the oryp6.

Smart AMP data was collected using a logic analyzer connected to the IC
during system start on proprietary firmware. This data is then used to
generate a C file [1].

[1]: https://github.com/system76/smart-amp

Change-Id: I57781a7223a52b8fc5295cf686412926529c3a7f
Signed-off-by: Jeremy Soller <jeremy@system76.com>
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52417
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/system76/oryp6/Kconfig

@@ -4,6 +4,7 @@ config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select BOARD_ROMSIZE_KB_16384
 	select DRIVERS_I2C_HID
+	select DRIVERS_I2C_TAS5825M
 	select EC_SYSTEM76_EC
 	select EC_SYSTEM76_EC_BAT_THRESHOLDS
 	select EC_SYSTEM76_EC_COLOR_KEYBOARD

src/mainboard/system76/oryp6/Makefile.inc

@@ -6,3 +6,4 @@ bootblock-y += gpio_early.c
 ramstage-y += ramstage.c
 ramstage-y += gpio.c
 ramstage-y += hda_verb.c
+ramstage-y += tas5825m.c

src/mainboard/system76/oryp6/devicetree.cb

@@ -209,7 +209,12 @@ chip soc/intel/cannonlake
 		device pci 1f.3 on      # Intel HDA
 			register "PchHdaAudioLinkHda" = "1"
 		end
-		device pci 1f.4 on  end # SMBus
+		device pci 1f.4 on      # SMBus
+			chip drivers/i2c/tas5825m
+				register "id" = "0"
+				device i2c 4e on end # (8bit address: 0x9c)
+			end
+		end
 		device pci 1f.5 on  end # PCH SPI
 		device pci 1f.6 off end # GbE
 	end