Revert "OMAP4: EMIF: code cleanup and clarification"

This reverts commit b7f11906f650325e2ebedb34a89bfe23eefe54ca.
Revert "OMAP4470 LPDDR interface configuration update for 466MHz"

This reverts commit f1a8bba0666a4913751ceec6e9dd2a011142b7d1.
Revert "OMAP4470: Memory timings fix for LPDDR2 466 MHz"

This reverts commit 2db8d211b17819d1828db8d6ed37bb93ef8f32ba.
Revert "OMAP4: EMIF: Added timings for 466MHz elpida lpddr2 memory"

This reverts commit 36042c14f70bbab474d331492915fd2de3393f1a.
cleanup