mb/starlabs/lite/{glk/glkr}: Decrease S3 assertion time to 28 ms

Set S3 assertion time to 28000us as this is sufficient time for
rails to discharge.

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: I4a14e7b30bb1fc4c0c1d3ff2f75069863458487f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64447
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/starlabs/lite/variants/glk/devicetree.cb b/src/mainboard/starlabs/lite/variants/glk/devicetree.cb
index 44f88ef..afa2243 100644
--- a/src/mainboard/starlabs/lite/variants/glk/devicetree.cb
+++ b/src/mainboard/starlabs/lite/variants/glk/devicetree.cb
@@ -53,7 +53,7 @@
 	register "gpe0_dw2"			= "PMC_GPE_N_95_64"
 	register "gpe0_dw3"			= "PMC_GPE_NW_31_0"
 
-	register "slp_s3_assertion_width_usecs"	= "50000"
+	register "slp_s3_assertion_width_usecs"	= "28000"
 
 	device domain 0 on
 		device pci 00.0 on  end						# Host Bridge
diff --git a/src/mainboard/starlabs/lite/variants/glkr/devicetree.cb b/src/mainboard/starlabs/lite/variants/glkr/devicetree.cb
index 18e6306..afa3fa7 100644
--- a/src/mainboard/starlabs/lite/variants/glkr/devicetree.cb
+++ b/src/mainboard/starlabs/lite/variants/glkr/devicetree.cb
@@ -51,7 +51,7 @@
 	register "gpe0_dw2"			= "PMC_GPE_N_95_64"
 	register "gpe0_dw3"			= "PMC_GPE_NW_31_0"
 
-	register "slp_s3_assertion_width_usecs"	= "50000"
+	register "slp_s3_assertion_width_usecs"	= "28000"
 
 	device domain 0 on
 		device pci 00.0 on  end						# Host Bridge