vregion: Remove include <rtos/alloc.h> from !CONFIG_SOF_VREGIONS part

Remove include <rtos/alloc.h> from CONFIG_SOF_VREGIONS not defined part,
there is no reason to have it there.

Signed-off-by: Jyri Sarha <jyri.sarha@linux.intel.com>

Author: Jyri Sarha

src/include/sof/lib/vregion.h

@@ -125,8 +125,6 @@ void vregion_mem_info(struct vregion *vr, size_t *size, uintptr_t *start);
 
 #else /* CONFIG_SOF_VREGIONS */
 
-#include <rtos/alloc.h>
-
 struct vregion {
 	unsigned int use_count;
 };