drivers: firmware: xilinx: Add support for feature check

Query for corresponding feature before calling EEMI API
from the driver.

Signed-off-by: Ravi Patel <ravi.patel@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>

include/linux/firmware/xlnx-zynqmp.h

@@ -48,6 +48,10 @@
 #define	ZYNQMP_PM_CAPABILITY_WAKEUP	0x4U
 #define	ZYNQMP_PM_CAPABILITY_UNUSABLE	0x8U
 
+/* Feature check status */
+#define PM_FEATURE_INVALID		-1
+#define PM_FEATURE_UNCHECKED		0
+
 /*
  * Firmware FPGA Manager flags
  * XILINX_ZYNQMP_PM_FPGA_FULL:	FPGA full reconfiguration
@@ -78,11 +82,14 @@ enum pm_api_id {
 	PM_CLOCK_GETRATE,
 	PM_CLOCK_SETPARENT,
 	PM_CLOCK_GETPARENT,
+	PM_FEATURE_CHECK = 63,
+	PM_API_MAX,
 };
 
 /* PMU-FW return status codes */
 enum pm_ret_status {
 	XST_PM_SUCCESS = 0,
+	XST_PM_NO_FEATURE = 19,
 	XST_PM_INTERNAL = 2000,
 	XST_PM_CONFLICT,
 	XST_PM_NO_ACCESS,