firmware: xilinx: Fix SD DLL node reset issue

Fix the SD DLL node reset issue where incorrect node is being referenced
instead of SD DLL node.

Fixes: 426c8d85 ("firmware: xilinx: Use APIs instead of IOCTLs")

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Link: https://lore.kernel.org/r/1605534744-15649-1-git-send-email-manish.narani@xilinx.com


Signed-off-by: Michal Simek <michal.simek@xilinx.com>