tree: Use boolean for lpss_s0ix_enable

lpss_s0ix_enable is already defined as boolean:
`git grep lpss_s0ix_enable $(find -type f -name "*.h")
src/soc/intel/apollolake/chip.h:        bool lpss_s0ix_enable;`

Change-Id: I34bd568defe202daaad6136b9c184bc292a226b3
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84160
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>

src/mainboard/google/octopus/variants/baseboard/devicetree.cb

@@ -52,7 +52,7 @@ chip soc/intel/apollolake
 	register "slp_s3_assertion_width_usecs" = "28000"
 
 	# Enable lpss s0ix
-	register "lpss_s0ix_enable" = "1"
+	register "lpss_s0ix_enable" = "true"
 
 	# Enable DPTF
 	register "dptf_enable" = "1"

src/mainboard/google/reef/variants/baseboard/devicetree.cb

@@ -63,7 +63,7 @@ chip soc/intel/apollolake
 	register "hdaudio_bios_config_lockdown" = "1"
 
 	# Enable lpss s0ix
-	register "lpss_s0ix_enable" = "1"
+	register "lpss_s0ix_enable" = "true"
 
 	# GPE configuration
 	# Note that GPE events called out in ASL code rely on this

src/mainboard/google/reef/variants/coral/devicetree.cb

@@ -63,7 +63,7 @@ chip soc/intel/apollolake
 	register "hdaudio_bios_config_lockdown" = "1"
 
 	# Enable lpss s0ix
-	register "lpss_s0ix_enable" = "1"
+	register "lpss_s0ix_enable" = "true"
 
 	# GPE configuration
 	# Note that GPE events called out in ASL code rely on this

src/mainboard/google/reef/variants/pyro/devicetree.cb

@@ -63,7 +63,7 @@ chip soc/intel/apollolake
 	register "hdaudio_bios_config_lockdown" = "1"
 
 	# Enable lpss s0ix
-	register "lpss_s0ix_enable" = "1"
+	register "lpss_s0ix_enable" = "true"
 
 	# GPE configuration
 	# Note that GPE events called out in ASL code rely on this

src/mainboard/google/reef/variants/sand/devicetree.cb

@@ -60,7 +60,7 @@ chip soc/intel/apollolake
 	register "hdaudio_bios_config_lockdown" = "1"
 
 	# Enable lpss s0ix
-	register "lpss_s0ix_enable" = "1"
+	register "lpss_s0ix_enable" = "true"
 
 	# GPE configuration
 	# Note that GPE events called out in ASL code rely on this

src/mainboard/google/reef/variants/snappy/devicetree.cb

@@ -63,7 +63,7 @@ chip soc/intel/apollolake
 	register "hdaudio_bios_config_lockdown" = "1"
 
 	# Enable lpss s0ix
-	register "lpss_s0ix_enable" = "1"
+	register "lpss_s0ix_enable" = "true"
 
 	# GPE configuration
 	# Note that GPE events called out in ASL code rely on this

src/mainboard/intel/glkrvp/variants/baseboard/devicetree.cb

@@ -64,7 +64,7 @@ chip soc/intel/apollolake
 	register "hdaudio_bios_config_lockdown" = "1"
 
 	# Enable lpss s0ix
-	register "lpss_s0ix_enable" = "1"
+	register "lpss_s0ix_enable" = "true"
 
 	# GPE configuration
 	# Note that GPE events called out in ASL code rely on this