src/device/dram: Fix typo

Change-Id: I5d8e5f978c538d2b9f74b29e21eb39ce6455315f
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/28504
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/device/dram/ddr2.c

@@ -124,7 +124,7 @@ u32 spd_decode_eeprom_size_ddr2(u8 byte1)
 /**
  * \brief Return index of MSB set
  *
- * Returns the index fof MSB set.
+ * Returns the index of MSB set.
  */
 u8 spd_get_msbs(u8 c)
 {