Updated pin configuration for LPC1100XL.
Updated platform definitions. Extended pin support for SSP and UART.
Minor updates in SSP, UART and clocking.
Removed unnecessary notices.
Configuration of alternate pins used as outputs replaced with common
setup as input pins, direction makes no sense in case of alternate
pin functions.
Added SSEL (CS) pin configuration in SSP common setup.
Fixed internal oscillator frequency in LPC43xx driver.