soc/amd/picasso: initialize i2c controllers in SoC flow

BUG=b:153642124
TEST=Saw I2C communication

Change-Id: I31f8b97d1ff7b687d7e078d5b594d1ad73c815e7
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/2145457
Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Tested-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40868
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/amd/picasso/southbridge.c

@@ -467,6 +467,7 @@ BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, set_nvs_sws, NULL);
 
 void southbridge_init(void *chip_info)
 {
+	i2c_soc_init();
 	sb_init_acpi_ports();
 	acpi_clear_pm1_status();
 }