spi: zynq_qspi: Add missing prototype for update_stripe

Add missing prototype to fix the sparse warning,
warning: no previous prototype for 'update_stripe'
[-Wmissing-prototypes].

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20241016044402.18052-1-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
1 file changed