fpga: Migrate CONFIG_MAX_FPGA_DEVICES to Kconfig

This is always defined to 5, so use that as the default.

Cc: Michal Simek <michal.simek@amd.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Michal Simek <michal.simek@amd.com>
3 files changed