[RAMEN9610-12171] android: ion: remove trailing whitespaces

[RAMEN9610-12171] android: ion: remove trailing whitespaces

Since 'commit 739bf5308f1d ("ion: remove recursive lock")', the list
of devices which have mapping of a buffer in the list of buffers shown
by /sys/kernel/debug/ion/buffers and oom killer notifier is removed
because it causes deadlock. But the title of the removed display item
and the trailing whitespaces at each line are still alive.

Change-Id: Ib6cb01306b97849ac6eea7198f0f6c725faa415b
Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>