CONFIG_PPC4xx_OCM is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
PPC4xx On Chip Memory (OCM) support
modulename: ppc4xx_ocm.ko
configname: CONFIG_PPC4xx_OCM
Linux Kernel Configuration
└─>PPC4xx On Chip Memory (OCM) support
In linux kernel since version 3.1 (release Date: 2011-10-24)
Enable OCM support for PowerPC 4xx platforms with on chip memory,
OCM provides the fast place for memory access to improve performance.
OCM provides the fast place for memory access to improve performance.