USB I/O stress tests

Merge branch 'master' into next

Filter out mc_test_suite for beagle

get_i2c_slave_addr.sh: Change default values for am37x-evm

am37x-evm has a unused i2c slave device on bus 3, address 0x5d.
This patch changes the default bus and slave address for am37x-evm

Signed-Off-By: Carlos Hernandez <c-hernandez8@ti.com>

Signed-off-by: Yan Liu <yan-liu@ti.com>

Added other davinci family platforms into Makefile

Fixed problem with LDFLAGS