zram: Add LZ4 support

Add LZ4 compressor support.  Enable it with
CONFIG_ZRAM_LZ4_COMPRESS=y

Signed-off-by: Chris Fries <cfries@motorola.com>
Change-Id: I29ae3771cb550d5ced829b16ca821e122055c325
Reviewed-on: http://gerrit.mot.com/718470
SLTApproved: Slta Waiver <sltawvr@motorola.com>
Tested-by: Jira Key <jirakey@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
2 files changed