misc: microchip: pci1xxxx: Remove duplicate include

Remove duplicate include in mchp_pci1xxxx_gpio.c

Fixes: 7d3e4d80 ("misc: microchip: pci1xxxx: load gpio driver for the gpio controller auxiliary device enumerated by the auxiliary bus driver.")
Reviewed-by: Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>
Signed-off-by: Yihao Han <hanyihao@vivo.com>
Link: https://lore.kernel.org/r/20220913030257.22352-1-hanyihao@vivo.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c

@@ -6,7 +6,6 @@
 #include <linux/spinlock.h>
 #include <linux/gpio/driver.h>
 #include <linux/bio.h>
-#include <linux/spinlock.h>
 #include <linux/mutex.h>
 #include <linux/kthread.h>
 #include <linux/interrupt.h>