powerpc/t208xqds: fix esdhc peripheral clock support

The patch that enabled eSDHC peripheral clock support had an
obvious error as below. This patch is used to fix it.

+#define define CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK

Fixes: 3285e6cb ("powerpc/t2080qds: enable eSDHC peripheral clock support")
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>