Revert "mali_kbase: platform: Add per-process and global account..."

Revert submission 1960415-dma-buf-sysfs

Reason for revert: causing kbase KPs
Reverted Changes:
Ib1400afdb:mali_kbase: platform: Add sysfs nodes for imported...
Id47feadaf:mali_kbase: platform: Add per-process and global s...
I29da69e46:mali_kbase: platform: Add per-process and global a...

Bug: 194313269
Change-Id: I285e1ed7266d8e0e7ae89518ffac04b0dd2d9c9d
Signed-off-by: Jonglin Lee <jonglin@google.com>