firmware/psci: Add definitions for PSCI v1.3 specification

The v1.3 PSCI spec (https://developer.arm.com/documentation/den0022) adds
the SYSTEM_OFF2 function. Add definitions for it and its hibernation type
parameter.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20241019172459.2241939-2-dwmw2@infradead.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

Author: dwmw2

include/uapi/linux/psci.h

@@ -59,6 +59,7 @@
 #define PSCI_1_1_FN_SYSTEM_RESET2		PSCI_0_2_FN(18)
 #define PSCI_1_1_FN_MEM_PROTECT			PSCI_0_2_FN(19)
 #define PSCI_1_1_FN_MEM_PROTECT_CHECK_RANGE	PSCI_0_2_FN(20)
+#define PSCI_1_3_FN_SYSTEM_OFF2			PSCI_0_2_FN(21)
 
 #define PSCI_1_0_FN64_CPU_DEFAULT_SUSPEND	PSCI_0_2_FN64(12)
 #define PSCI_1_0_FN64_NODE_HW_STATE		PSCI_0_2_FN64(13)
@@ -68,6 +69,7 @@
 
 #define PSCI_1_1_FN64_SYSTEM_RESET2		PSCI_0_2_FN64(18)
 #define PSCI_1_1_FN64_MEM_PROTECT_CHECK_RANGE	PSCI_0_2_FN64(20)
+#define PSCI_1_3_FN64_SYSTEM_OFF2		PSCI_0_2_FN64(21)
 
 /* PSCI v0.2 power state encoding for CPU_SUSPEND function */
 #define PSCI_0_2_POWER_STATE_ID_MASK		0xffff
@@ -100,6 +102,9 @@
 #define PSCI_1_1_RESET_TYPE_SYSTEM_WARM_RESET	0
 #define PSCI_1_1_RESET_TYPE_VENDOR_START	0x80000000U
 
+/* PSCI v1.3 hibernate type for SYSTEM_OFF2 */
+#define PSCI_1_3_OFF_TYPE_HIBERNATE_OFF		BIT(0)
+
 /* PSCI version decoding (independent of PSCI version) */
 #define PSCI_VERSION_MAJOR_SHIFT		16
 #define PSCI_VERSION_MINOR_MASK			\