fix(include/drivers/flexspi): fix warm boot wait time for MT35XU512A

Now lx2 which use MT35XU512A supports warm boot, fix the macro
define caused by the commit:
feat(driver/nxp/xspi): add MT35XU02G flash info

Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I83eb8cb9a30ac7c7efd5a010acbd03eddebed52b
1 file changed