ARM: i.MX6: Fix "emi" clock name typo

ARM: i.MX6: Fix "emi" clock name typo

Fix a typo error, the "emi" names refer to the eim clocks.

The change fixes typo in EIM and EIM_SLOW pre-output dividers and
selectors clock names. Notably EIM_SLOW clock itself is named correctly.

Signed-off-by: Steve Longerbeam <[email protected]>
[[email protected]: ported to v3.17]
Signed-off-by: Vladimir Zapolskiy <[email protected]>
Cc: Sascha Hauer <[email protected]>
Signed-off-by: Shawn Guo <[email protected]>