vc4: Move vc4_packet.h to the kernel/ directory, since it's also shared.

I want to notice discrepancies when I diff -u between Mesa and the kernel.

src/gallium/drivers/vc4/Makefile.sources

@@ -1,6 +1,7 @@
 C_SOURCES := \
 	kernel/vc4_drv.h \
 	kernel/vc4_gem.c \
+	kernel/vc4_packet.h \
 	kernel/vc4_validate.c \
 	kernel/vc4_validate_shaders.c \
 	vc4_blit.c \
@@ -24,7 +25,6 @@ C_SOURCES := \
 	vc4_opt_dead_code.c \
 	vc4_opt_small_immediates.c \
 	vc4_opt_vpm_writes.c \
-	vc4_packet.h \
 	vc4_program.c \
 	vc4_qir.c \
 	vc4_qir_lower_uniforms.c \

src/gallium/drivers/vc4/vc4_cl.h

@@ -29,7 +29,7 @@
 #include "util/u_math.h"
 #include "util/macros.h"
 
-#include "vc4_packet.h"
+#include "kernel/vc4_packet.h"
 
 struct vc4_bo;
 

src/gallium/drivers/vc4/vc4_resource.h

@@ -26,7 +26,7 @@
 #define VC4_RESOURCE_H
 
 #include "vc4_screen.h"
-#include "vc4_packet.h"
+#include "kernel/vc4_packet.h"
 #include "util/u_transfer.h"
 
 struct vc4_transfer {