Removed CS4L22 pins initialization

Some of them were already used by SD card (GPIOC_PIN10 and GPIOC_PIN12).
Dropped ChibiStudio configurator files (chcfg)

Since I do not use it and can't confirm sanity of hand-changing various
bits of chcfg file.
Merge branch 'master' into rtc

Conflicts:
	cfg/board.chcfg
Removed LIS302DL pins initialization

One of them was already used by Ethernet (GPIOA_PIN7).
Merge branch 'master' into rtc