Revert "arch/arm/Kconfig: enable unaligned capability for ARM"

This reverts commit 99172e84058f4675cc55c0baade9f5fae4c5bdf7.
Revert "ARM: 7493/1: use generic unaligned.h"

This reverts commit 17c092400840b75d55ebdd05b8645bca34f0e9d8.
Revert "Enable pipe flag"

This reverts commit 98c26b66a058d8f7a934ef79bde68463525639a0.