mmc: card: fix timeout on erase/trim command due to sanitize

Sanitize command should never be issued with timeout argument of 0,
cause then it invokes timeout.
Moreover, sanitize command should not be called from routines that
does erase/trim/secure-discard commands, but only from a routine that
issues the sanitize specifically.(mmc_blk_issue_sanitize_rq)

Change-Id: I2fc9d17d876de3440f7cdee5fce0158a919c7c6f
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>