vc4/v3d: restore calling debug_get_option_vc4/v3d_debug

As it is needed to have V3D_DEBUG defined. For the v3d case, I did it
restoring v3d_process_debug_variable, as it is at v3d_debug.c that
DEBUG_GET_ONCE_FLAGS_OPTION is called.

Fixes: 106b33405e ("vc4/v3d: stop adding NORAST when SHADERDB debug option is used")

Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17812>

src/broadcom/common/v3d_debug.c

@@ -117,3 +117,9 @@ v3d_debug_flag_for_shader_stage(gl_shader_stage stage)
         STATIC_ASSERT(MESA_SHADER_STAGES == 6);
         return flags[stage];
 }
+
+void
+v3d_process_debug_variable(void)
+{
+        V3D_DEBUG = debug_get_option_v3d_debug();
+}

src/broadcom/common/v3d_debug.h

@@ -90,6 +90,8 @@ extern uint32_t V3D_DEBUG;
 
 extern uint32_t v3d_debug_flag_for_shader_stage(gl_shader_stage stage);
 
+extern void v3d_process_debug_variable(void);
+
 #ifdef __cplusplus
 }
 #endif

src/broadcom/vulkan/v3dv_device.c

@@ -225,6 +225,8 @@ v3dv_CreateInstance(const VkInstanceCreateInfo *pCreateInfo,
       return vk_error(NULL, result);
    }
 
+   v3d_process_debug_variable();
+
    instance->physicalDeviceCount = -1;
 
    /* We start with the default values for the pipeline_cache envvars */

src/gallium/drivers/v3d/v3d_screen.c

@@ -889,6 +889,8 @@ v3d_screen_create(int fd, const struct pipe_screen_config *config,
 
         v3d_fence_init(screen);
 
+        v3d_process_debug_variable();
+
         v3d_resource_screen_init(pscreen);
 
         screen->compiler = v3d_compiler_init(&screen->devinfo, 0);

src/gallium/drivers/vc4/vc4_screen.c

@@ -588,6 +588,8 @@ vc4_screen_create(int fd, struct renderonly *ro)
 
         vc4_fence_screen_init(screen);
 
+        debug_get_option_vc4_debug();
+
 #ifdef USE_VC4_SIMULATOR
         vc4_simulator_init(screen);
 #endif