mtd: nand: zynq_nand: Change datatype of status and ecc_status to int

mtd: nand: zynq_nand: Change datatype of status and ecc_status to int

status and ecc_status are of unsigned type where they are compared for
negative value. This is pointed by below sparse warning. Change datatype
to int to fix this.
warning: comparison of unsigned expression in '< 0' is always false
[-Wtype-limits]

Signed-off-by: Algapally Santosh Sagar <santoshsagar.algapally@amd.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com>
Link: https://lore.kernel.org/r/20230614090359.10809-5-ashok.reddy.soma@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>