mb/google/brya/var/felwinter: Update audio_amp fw config field name

https://github.com/thesofproject/linux/pull/3271
Felwinter will use the OEM string for SOF tplg loading. Update the name
that match to the kernel driver.

BUG=b:210061842
TEST=dmidecode can show AUDIO_AMP-MAX98360_ALC5682VS_I2S_2WAY.

Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Change-Id: Ib6114d047762ba26071c9cdc6c43d80f933c1eb9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61070
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brya/variants/felwinter/overridetree.cb

@@ -11,7 +11,7 @@ fw_config
 	field AUDIO_AMP 7 9
 		option UNPROVISIONED		0
 		option MAX98360_ALC5682I_I2S	1
-		option MAX98360_ALC5682VS_I2S	2
+		option MAX98360_ALC5682VS_I2S_2WAY	2
 	end
 end
 
@@ -232,7 +232,7 @@ chip soc/intel/alderlake
 				register "property_list[0].name" = ""realtek,jd-src""
 				register "property_list[0].integer" = "1"
 				device i2c 1a on
-					probe AUDIO_AMP MAX98360_ALC5682VS_I2S
+					probe AUDIO_AMP MAX98360_ALC5682VS_I2S_2WAY
 				end
 			end
 		end #I2C0