[WCNCR00146539] misc: fix compilation errors with kernel 2.6.32

[Description]
Fix compilation error with kernel 2.6.32.
Replace remove_proc_subtree() with remove_proc_entry() in
old kernel version.

Change-Id: I1532e6c4e9a767325f50cca1bb6ff445c569293a
Feature: misc
Signed-off-by: Awk Jiang <awk.jiang@mediatek.com>
CR-Id: WCNCR00146539
1 file changed