spi: spi-uclass: Add support to manually relocate spi memory ops

Add spi memory operations to relocate manually when
CONFIG_NEEDS_MANUAL_RELOC is enabled.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Acked-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>