ti_armv7_common: i2c: do not define DM_I2C for spl

Since omap's spl doesn't support DM currently, do not define
DM_I2C for spl build.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
1 file changed