score: atomic support for RTEMS. Atomic operations for PowerPC.
tests: atomic support for RTEMS. Uniprocessor tests for atomic ops.
tests: atomic support for RTEMS. SMP tests for atomic operations.
score: atomic support for RTEMS. Cleanup.
bsp/erc32: Fix warnings
libchip/serial: Fix warnings
libchip/serial: Fix warnings
libchip/serial: Fix warnings
libchip/serial: Add const qualifier
libchip/serial: Make NS16550 handler public

This allows derived drivers to use these functions.
bsp/lpc24xx: Move UART probes to separate files
PR1560: _Objects_Extend_information improper alignment

_Objects_Extend_information uses a sizeof(uint32_t) offset that leads to
improper alignment in case the CPU (actually, heap) alignment is 8 or higher.
The problem is solved by adding enough padding to align the sub-tables.
sparc64: revert linkcmds to 4 MB ram size
bsp/lpc32xx: Add BSP_USB_OTG_TRANSCEIVER_VBUS
score: Add and use rtems_assert_context
sapi: PR1911: Add CONFIGURE_DISABLE_BSP_SETTINGS
sptests/spfatal11: Update due to API changes
score: New routines to align addresses up or down.
score: use new alignment routine in object extend information.
bsps/powerpc: Remove unused files