platform/x86: silead_dmi: Add silead, home-button property to some tablets

Add "silead,home-button" property to entries for tablets which have
a capacitive home button (typically a windows logo on the front).

This new property is checked for by the new capacitive home button
support in the silead touchscreen driver.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/silead_dmi.c

@@ -58,6 +58,7 @@ static const struct property_entry dexp_ursus_7w_props[] = {
 	PROPERTY_ENTRY_U32("touchscreen-size-y", 630),
 	PROPERTY_ENTRY_STRING("firmware-name", "gsl1686-dexp-ursus-7w.fw"),
 	PROPERTY_ENTRY_U32("silead,max-fingers", 10),
+	PROPERTY_ENTRY_BOOL("silead,home-button"),
 	{ }
 };
 
@@ -72,6 +73,7 @@ static const struct property_entry surftab_wintron70_st70416_6_props[] = {
 	PROPERTY_ENTRY_STRING("firmware-name",
 			      "gsl1686-surftab-wintron70-st70416-6.fw"),
 	PROPERTY_ENTRY_U32("silead,max-fingers", 10),
+	PROPERTY_ENTRY_BOOL("silead,home-button"),
 	{ }
 };
 
@@ -116,6 +118,7 @@ static const struct property_entry pov_mobii_wintab_p800w_props[] = {
 	PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 	PROPERTY_ENTRY_STRING("firmware-name",
 			      "gsl3692-pov-mobii-wintab-p800w.fw"),
+	PROPERTY_ENTRY_BOOL("silead,home-button"),
 	{ }
 };
 
@@ -143,6 +146,7 @@ static const struct property_entry chuwi_hi8_pro_props[] = {
 	PROPERTY_ENTRY_U32("touchscreen-size-y", 1148),
 	PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 	PROPERTY_ENTRY_STRING("firmware-name", "gsl3680-chuwi-hi8-pro.fw"),
+	PROPERTY_ENTRY_BOOL("silead,home-button"),
 	{ }
 };