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

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: Ie601280db20e41ab01884552785feb9b0ac260a6
Signed-off-by: Jonglin Lee <jonglin@google.com>