[NDK] potypes.h: Add useful macros for SYSTEM_POWER_CAPABILITIES (#8386)

Add useful macros, similar to the powrprof.dll `IsPwr*()` functions,
but that are suitable when one has a `SYSTEM_POWER_CAPABILITIES`
structure initialized from `NtPowerInformation(SystemPowerCapabilities)`.

- `IS_PWR_SUSPEND_ALLOWED()`, equivalent to `IsPwrSuspendAllowed()`,
  indicating whether any of the S1, S2, S3 sleep states are supported.

- `IS_PWR_HIBERNATE_ALLOWED()`, equivalent to `IsPwrHibernateAllowed()`,
  indicating whether the S4 sleep state is supported and the
  hibernation file is present.

- `IS_PWR_POWEROFF_ALLOWED()`, equivalent to `IsPwrShutdownAllowed()`,
  indicating whether the S5 "soft-off" state is supported.

sdk/include/ndk/potypes.h

@@ -51,6 +51,33 @@ typedef enum _SYSTEM_DOCK_STATE
     SystemDocked
 } SYSTEM_DOCK_STATE, *PSYSTEM_DOCK_STATE;
 
+//
+// Some useful macros for SYSTEM_POWER_CAPABILITIES,
+// similar to the powrprof.dll IsPwr*() functions.
+//
+
+/*
+ * BOOLEAN WINAPI
+ * IsPwrSuspendAllowed(VOID);
+ */
+#define IS_PWR_SUSPEND_ALLOWED(PowerCaps) \
+    ((PowerCaps)->SystemS1 || (PowerCaps)->SystemS2 || (PowerCaps)->SystemS3)
+
+/*
+ * BOOLEAN WINAPI
+ * IsPwrHibernateAllowed(VOID);
+ */
+#define IS_PWR_HIBERNATE_ALLOWED(PowerCaps) \
+    ((PowerCaps)->SystemS4 && (PowerCaps)->HiberFilePresent)
+
+/*
+ * BOOLEAN WINAPI
+ * IsPwrShutdownAllowed(VOID);
+ */
+#define IS_PWR_POWEROFF_ALLOWED(PowerCaps) \
+    (!!(PowerCaps)->SystemS5)
+
+
 #ifndef NTOS_MODE_USER
 
 //