Defconfig for ARM based on poky; for convenience in testing

Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>
Add hooks to compile lsi2c and lsspi applets

Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>
add SPI bus fake enumeration stub

Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>
add I2C bus fake enumeration applet lsi2c

Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>