i2c: Add support for Qualcomm I2C driver

Add support for Qualcomm I2C QUP driver which is inspired from
corresponding driver in Linux: drivers/i2c/busses/i2c-qup.c.

Currently this driver only support FIFO polling mode which is sufficient
to support devices like eeprom, rtc etc.

Co-developed-by: Mike Worsfold <mworsfold@impinj.com>
Signed-off-by: Mike Worsfold <mworsfold@impinj.com>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index cde0597..8a70b5b 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -37,6 +37,7 @@
 obj-$(CONFIG_SYS_I2C_OCORES) += ocores_i2c.o
 obj-$(CONFIG_SYS_I2C_OCTEON) += octeon_i2c.o
 obj-$(CONFIG_SYS_I2C_OMAP24XX) += omap24xx_i2c.o
+obj-$(CONFIG_SYS_I2C_QUP) += qup_i2c.o
 obj-$(CONFIG_SYS_I2C_RCAR_I2C) += rcar_i2c.o
 obj-$(CONFIG_SYS_I2C_RCAR_IIC) += rcar_iic.o
 obj-$(CONFIG_SYS_I2C_ROCKCHIP) += rk_i2c.o