xilinx: zynqmp: Do not guard SPL_FS_LOAD_PAYLOAD_NAME by SDHCI driver

xilinx: zynqmp: Do not guard SPL_FS_LOAD_PAYLOAD_NAME by SDHCI driver

CONFIG_SPL_FS_LOAD_PAYLOAD_NAME is used by set_dfu_alt_info() for string
generation. It doesn't depend on SDHCI because the same file can be stored
to other non volatile memories like qspi.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/97434e122c6f8f042330b60d3e8de4c31f3e3f93.1652192580.git.michal.simek@amd.com
Link: https://lore.kernel.org/r/718de136c68c9a76fc7b4e536a727f401b05bfb9.1652702625.git.michal.simek@amd.com