uboot-phytec

omap24xx_i2c: Handle wait_for_bb error

We add a return code to wait_for_bb() to be able to report errors to the
callers properly. We in turn handle this new error code in i2c_read, i2c_write
and i2c_probe.

Signed-off-by: Vincent Stehlé <v-stehle@ti.com>