soc/mediatek/common/include/soc: Include header file for check_member

To fix the build error below when include i2c_common.h, we should
include the necessary header for check_member.

"""
src/soc/mediatek/common/include/soc/i2c_common.h:24:42: error: expected ')' before numeric constant
   24 | check_member(mt_i2c_dma_regs, dma_tx_len, 0x24);
      |                                          ^~~~~
      |                                          )
"""

TEST=abuild -t google/geralt -b ciri -a

Signed-off-by: Ruihai Zhou <zhouruihai@huaqin.corp-partner.google.com>
Change-Id: I266571686e452e2b7514afee42ff0a48f8891831
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81684
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: cong yang <yangcong5@huaqin.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/common/include/soc/i2c_common.h

@@ -3,6 +3,7 @@
 #ifndef MTK_COMMON_I2C_H
 #define MTK_COMMON_I2C_H
 
+#include <commonlib/bsd/helpers.h>
 #include <device/i2c.h>
 
 /* I2C DMA Registers */