{chiron,sagit}_defconfig: clean up configs

{chiron,sagit}_defconfig: clean up configs

Remove SCSI media changer support
Remove Ethernet plug in card support
Remove Qualcomm HBTP driver
Remove PPP sync support
Remove Linux Logo
Remove PCI and SPI sound card support
Remove Serial based input device support
Remove Elecom BT mouse support
Remove USB touch screen support
Remove X-Gene Phy support
Remove Non-USB Mouse, Joystick support

Enable Wacom input
Enable Realtek USB Ethernet support
Enable Announce USB device

Test: Keyboard, Mouse, Ethernet(USB3GIGV1), Headset
Test: Power/Volume Up/Down hard keys work
Change-Id: Icfdcc6ee0479c8d943a330d724aa29e0f0ca47ee
Signed-off-by: Patrick Tjin <pattjin@google.com>