accel/habanalabs: add HL_GET_P_STATE passthrough type

Add a new passthrough type HL_GET_P_STATE to the cpucp generic ioctl
to allow userspace to read the device performance state via firmware.

Signed-off-by: Ariel Aviad <[e-mail]>
Reviewed-by: Koby Elbaz <[e-mail]>
Signed-off-by: Koby Elbaz <[e-mail]>

drivers/accel/habanalabs/common/habanalabs_ioctl.c

···
 	case  HL_GET_ERR_COUNTERS_CMD:
 		need_input_buff = true;
 		break;
+	case HL_GET_P_STATE:
+		need_input_buff = false;
+		break;
 	default:
 		return -EINVAL;
 	}

include/linux/habanalabs/cpucp_if.h

···
  *
  * HL_PASSTHROUGHT_VERSIONS	- Fetch all firmware versions.
  * HL_GET_ERR_COUNTERS_CMD	- Command to get error counters
+ * HL_GET_P_STATE		- get performance state
  */
 enum hl_passthrough_type {
 	HL_PASSTHROUGH_VERSIONS,
 	HL_GET_ERR_COUNTERS_CMD,
+	HL_GET_P_STATE,
 };
 
 #endif /* CPUCP_IF_H */