pit: Get rid of the mostly unnecessary exynos5420.h

Like on kirby, this header had a single constant in it that was actually used.
This change moves that constant inline and gets rid of the header file.

Change-Id: Ibe380396f72fddb121fb6ceb3cee24f1b9a85738
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/64163
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4420
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/mainboard/google/pit/romstage.c b/src/mainboard/google/pit/romstage.c
index 255f292..c11f712 100644
--- a/src/mainboard/google/pit/romstage.c
+++ b/src/mainboard/google/pit/romstage.c
@@ -40,8 +40,6 @@
 #include <drivers/maxim/max77802/max77802.h>
 #include <device/i2c.h>
 
-#include "exynos5420.h"
-
 #define MMC0_GPIO_PIN	(58)
 
 struct pmic_write
@@ -89,7 +87,7 @@
 
 	/* Initialize I2C bus to configure PMIC. */
 	exynos_pinmux_i2c4();
-	i2c_init(4, I2C_4_SPEED, 0x00);
+	i2c_init(4, 1000000, 0x00); /* 1MHz */
 
 	printk(BIOS_DEBUG, "%s: Setting up PMIC...\n", __func__);