plat: xilinx: zynqmp: Remove GET_CALLBACK_DATA function

GET_CALLBACK_DATA function is not required now. IPI mailbox
can be used instead of GET_CALLBACK_DATA function.
Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>

plat/xilinx/zynqmp/pm_service/pm_api_sys.c

@@ -601,18 +601,6 @@ enum pm_ret_status pm_secure_rsaaes(uint32_t address_low,
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
 
-/**
- * pm_get_callbackdata() - Read from IPI response buffer
- * @data - array of PAYLOAD_ARG_CNT elements
- *
- * Read value from ipi buffer response buffer.
- */
-void pm_get_callbackdata(uint32_t *data, size_t count)
-{
-	pm_ipi_buff_read_callb(data, count);
-	pm_ipi_irq_clear(primary_proc);
-}
-
 /**
  * pm_pinctrl_request() - Request Pin from firmware
  * @pin		Pin number to request

plat/xilinx/zynqmp/pm_service/pm_api_sys.h

@@ -113,7 +113,6 @@ enum pm_ret_status pm_secure_rsaaes(uint32_t address_high,
 				    uint32_t address_low,
 				    uint32_t size,
 				    uint32_t flags);
-void pm_get_callbackdata(uint32_t *data, size_t count);
 unsigned int pm_get_shutdown_scope(void);
 enum pm_ret_status pm_pinctrl_request(unsigned int pin);
 enum pm_ret_status pm_pinctrl_release(unsigned int pin);

plat/xilinx/zynqmp/pm_service/pm_svc_main.c

@@ -16,7 +16,6 @@
 #include "pm_client.h"
 #include "pm_ipi.h"
 
-#define PM_GET_CALLBACK_DATA	0xa01
 #define PM_SET_SUSPEND_MODE	0xa02
 #define PM_GET_TRUSTZONE_VERSION	0xa03
 
@@ -256,16 +255,6 @@ uint64_t pm_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3,
 				       pm_arg[3]);
 		SMC_RET1(handle, (uint64_t)ret);
 
-	case PM_GET_CALLBACK_DATA:
-	{
-		uint32_t result[4];
-
-		pm_get_callbackdata(result, sizeof(result));
-		SMC_RET2(handle,
-			 (uint64_t)result[0] | ((uint64_t)result[1] << 32),
-			 (uint64_t)result[2] | ((uint64_t)result[3] << 32));
-	}
-
 	case PM_PINCTRL_REQUEST:
 		ret = pm_pinctrl_request(pm_arg[0]);
 		SMC_RET1(handle, (uint64_t)ret);