EDAC/fsl_ddr: Pass down fsl_mc_pdata in ddr_in32() and ddr_out32()

Pass down fsl_mc_pdata in helper functions ddr_in32() and ddr_out32() to
prepare for adding iMX9 support. The iMX9 has a slightly different
register layout.

No functional change.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20241016-imx95_edac-v3-1-86ae6fc2756a@nxp.com