drm/amd/display: remove redundant CONFIG_DRM_AMD_DC_DCN in irq

[Why & How]
CONFIG_DRM_AMD_DC_DCN is used by pass the compilation failures, but DC
code should be OS-agnostic.

This patch fixes it by removing unnecessasry CONFIG_DRM_AMD_DC_DCN
in irq directory.
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/irq/Makefile

@@ -71,7 +71,6 @@ AMD_DISPLAY_FILES += $(AMD_DAL_IRQ_DCE12)
 ###############################################################################
 # DCN 1x
 ###############################################################################
-ifdef CONFIG_DRM_AMD_DC_DCN
 IRQ_DCN1 = irq_service_dcn10.o
 
 AMD_DAL_IRQ_DCN1 = $(addprefix $(AMDDALPATH)/dc/irq/dcn10/,$(IRQ_DCN1))
@@ -136,7 +135,7 @@ IRQ_DCN31 = irq_service_dcn31.o
 AMD_DAL_IRQ_DCN31= $(addprefix $(AMDDALPATH)/dc/irq/dcn31/,$(IRQ_DCN31))
 
 AMD_DISPLAY_FILES += $(AMD_DAL_IRQ_DCN31)
-endif
+
 ###############################################################################
 # DCN 315
 ###############################################################################

drivers/gpu/drm/amd/display/dc/irq/dcn30/irq_service_dcn30.c

@@ -22,8 +22,6 @@
  *
  */
 
-#if defined(CONFIG_DRM_AMD_DC_DCN)
-
 #include "dm_services.h"
 
 #include "include/logger_interface.h"
@@ -450,4 +448,3 @@ struct irq_service *dal_irq_service_dcn30_create(
 	return irq_service;
 }
 
-#endif

drivers/gpu/drm/amd/display/dc/irq/dcn30/irq_service_dcn30.h

@@ -23,8 +23,6 @@
  *
  */
 
-#if defined(CONFIG_DRM_AMD_DC_DCN)
-
 #ifndef __DAL_IRQ_SERVICE_DCN30_H__
 #define __DAL_IRQ_SERVICE_DCN30_H__
 
@@ -34,4 +32,3 @@ struct irq_service *dal_irq_service_dcn30_create(
 	struct irq_service_init_data *init_data);
 
 #endif /* __DAL_IRQ_SERVICE_DCN30_H__ */
-#endif

drivers/gpu/drm/amd/display/dc/irq/irq_service.c

@@ -37,13 +37,8 @@
 #endif
 
 #include "dce80/irq_service_dce80.h"
-
 #include "dce120/irq_service_dce120.h"
-
-
-#if defined(CONFIG_DRM_AMD_DC_DCN)
 #include "dcn10/irq_service_dcn10.h"
-#endif
 
 #include "reg_helper.h"
 #include "irq_service.h"