ACPI: fix ACPI_FADT_S4_RTC_WAKE comment

Make the comment for ACPI_FADT_S4_RTC_WAKE match the ACPI spec;
that bit has nothing to do with status bits.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLen Brown <len.brown@intel.com>

include/acpi/actbl.h

@@ -245,7 +245,7 @@ struct acpi_table_fadt {
 #define ACPI_FADT_POWER_BUTTON      (1<<4)	/* 04: Power button is handled as a generic feature */
 #define ACPI_FADT_SLEEP_BUTTON      (1<<5)	/* 05: Sleep button is handled as a generic feature, or  not present */
 #define ACPI_FADT_FIXED_RTC         (1<<6)	/* 06: RTC wakeup stat not in fixed register space */
-#define ACPI_FADT_S4_RTC_WAKE       (1<<7)	/* 07: RTC wakeup stat not possible from S4 */
+#define ACPI_FADT_S4_RTC_WAKE       (1<<7)	/* 07: RTC wakeup possible from S4 */
 #define ACPI_FADT_32BIT_TIMER       (1<<8)	/* 08: tmr_val is 32 bits 0=24-bits */
 #define ACPI_FADT_DOCKING_SUPPORTED (1<<9)	/* 09: Docking supported */
 #define ACPI_FADT_RESET_REGISTER    (1<<10)	/* 10: System reset via the FADT RESET_REG supported */