assert: Simplify

drivers/wireless:  Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition.

drivers/sensors:  Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition.

net/:  Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition.

fs/:  Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition.

sched/:  Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition.

Button upper half driver:  Add definitions needed for compilation with the poll() interface is not disabled.

kinetis pwm support

Correct the can2 rx irq number for stm32f10xx chips

crc64: fix error

already prototyped in kinetis.h. It is enabled when CONFIG_DEBUG_GPIO
is defined.

libc/misc: add crc64