mb/google/poppy/variant/nami: Add custom VBT for panel T8/T10

Fix VBT SSF setting for panel T8/T10 as Akali/Akali360 panel
has T8 minimum 33.3 ms and T10 minimum of 100 ms.

BUG=b:111530392
BRANCH=nami
TEST=emerge-nami coreboot chromeos-bootimage
Test & measure T8/T10 waveform

Change-Id: I642a1aa0b2d13b33e6113f94e73dfc77834766d4
Signed-off-by: T.H. Lin <t.h_lin@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/27507
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/mainboard/google/poppy/variants/nami/include/variant/sku.h

@@ -26,5 +26,9 @@
 #define SKU_2_PANTHEON	0x3F62
 #define SKU_0_SONA	0x3AE2
 #define SKU_1_SONA	0x3AE3
+#define SKU_0_AKALI	0x29E1
+#define SKU_1_AKALI	0x2861
+#define SKU_0_AKALI360	0x2BE7
+#define SKU_1_AKALI360	0x2A67
 
 #endif /* __MAINBOARD_SKU_H__ */

src/mainboard/google/poppy/variants/nami/mainboard.c

@@ -184,6 +184,11 @@ const char *mainboard_vbt_filename(void)
 	case SKU_1_VAYNE:
 	case SKU_2_VAYNE:
 		return "vbt-vayne.bin";
+	case SKU_0_AKALI:
+	case SKU_1_AKALI:
+	case SKU_0_AKALI360:
+	case SKU_1_AKALI360:
+		return "vbt-akali.bin";
 	default:
 		return "vbt.bin";
 		break;