ARM: keystone: Drop PM domain support for k2g

K2G will use a different power domain driver than the rest of the
keystone family in order to make use of the TI SCI protocol so prevent
the standard keystone pm_domain code from registering itself in
preparation for a new driver.
Acked-by: NSantosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: NLokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: NDave Gerlach <d-gerlach@ti.com>
Signed-off-by: NSantosh Shilimkar <ssantosh@kernel.org>

arch/arm/mach-keystone/pm_domain.c

@@ -32,7 +32,9 @@ static struct pm_clk_notifier_block platform_domain_notifier = {
 };
 
 static const struct of_device_id of_keystone_table[] = {
-	{.compatible = "ti,keystone"},
+	{.compatible = "ti,k2hk"},
+	{.compatible = "ti,k2e"},
+	{.compatible = "ti,k2l"},
 	{ /* end of list */ },
 };