x86/apic: Drop enum apic_delivery_modes

The type is not used any more.

Replace the constants with plain defines so they can live outside of an
__ASSEMBLY__ block, allowing for more cleanup in subsequent changes.

Signed-off-by: Andrew Cooper <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Signed-off-by: Borislav Petkov (AMD) <[e-mail]>
Reviewed-by: Steve Wahl <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/x86/include/asm/apicdef.h

···
  */
 #define IO_APIC_SLOT_SIZE		1024
 
+#define APIC_DELIVERY_MODE_FIXED	0
+#define APIC_DELIVERY_MODE_LOWESTPRIO	1
+#define APIC_DELIVERY_MODE_SMI		2
+#define APIC_DELIVERY_MODE_NMI		4
+#define APIC_DELIVERY_MODE_INIT		5
+#define APIC_DELIVERY_MODE_EXTINT	7
+
 #define	APIC_ID		0x20
 
 #define	APIC_LVR	0x30
···
 #else
  #define BAD_APICID 0xFFFFu
 #endif
-
-enum apic_delivery_modes {
-	APIC_DELIVERY_MODE_FIXED	= 0,
-	APIC_DELIVERY_MODE_LOWESTPRIO   = 1,
-	APIC_DELIVERY_MODE_SMI		= 2,
-	APIC_DELIVERY_MODE_NMI		= 4,
-	APIC_DELIVERY_MODE_INIT		= 5,
-	APIC_DELIVERY_MODE_EXTINT	= 7,
-};
 
 #endif /* !__ASSEMBLY__ */
 #endif /* _ASM_X86_APICDEF_H */