staging: vchiq_core: Rectify header include for vchiq_dump_state()

The header vchiq_core.h does not need <linux/debugfs.h>. It needs
the <linux/seq_file.h> for vchiq_dump_state() to dump the vchiq
state through vchiq_debugfs.[ch].

Signed-off-by: Umang Jain <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h

···
 #include <linux/mutex.h>
 #include <linux/completion.h>
 #include <linux/dma-mapping.h>
-#include <linux/debugfs.h>
 #include <linux/dev_printk.h>
 #include <linux/kthread.h>
 #include <linux/kref.h>
 #include <linux/rcupdate.h>
+#include <linux/seq_file.h>
 #include <linux/spinlock_types.h>
 #include <linux/wait.h>