More renaming: up_lcdinitialize->board_lcd_initialize, up_lcdgetdev->board_lcd_getdev, up_lcduninitialize->board_lcd_uninitialize

SAMV7: Add SMC register definition header file; SAMV71-Xult: Add an LCD driver.  The initial commit is simply the SAVM4E-EK ILI9375 driver will bogus name changes to ILI9488.

rch_tcinitialize() and arch_tcunitinitialize() renamed to board_tsc_setup() and board_tsc_teardown().  These are not long called directly by applications but only indirectly throught the crappy boardctl() OS interface.

SAMV71-XULT: Add option to support connection of the maXTouch Xplained Pro on the 50-pin LCD connector

The STM32F4Discovery board doesn't come with a Low speed external oscillator so the default LSE source for the RTC doesn't work.

In stm32_rtcc.c the up_rtcinitialize() logic doesn't work with the LSI. The check on RTC_MAGIC on the BK0R register lead to rtc_setup() call that rightfully enables the lsi clock; but the next times, when the rtc is already setup, the rtc_resume() call does NOT start the lsi clock!

The right place to put LSE/LSI initialisation is inside stm32_stdclockconfig() in stm32fxxxxx_rcc.c.  Doing this I checked the possible uses of the LSI and the LSE sources: the LSI can be used for RTC and/or the IWDG, while the LSE only for the RTC (and to output the MCO1 pin)..

This change is not verifed for any other platforms.

From Leo Aloe3132

SAMV7 Ethernet:  I- and D-Cache are now enabled in the netnsh/ configuration.  D-Cache is enabled in write-though mode.  This mode is necessary because the DMA descriptors are each 8-bytes in size but the D-Cache cache line is 32-bits in size. So it is impossible make coherency for every 8-byte DMA descriptor without write-through.

Clean up pointer handling to make code more readability.  This re-introduces the compiler optimization problem but this is the correct thing to do.  I will have to drop back from -Os to -O2.

SAMV7 EMAC: Fix alignment issue: RX buffers need to be invalidated.  This means the alignment of buffers must be at least to the data cache line size at both ends of the buffer

SAMV7 EMAC: Sometimes TX is not started when TSTART is set??? Workaround seems to be to set it twice.  Restored full optimization.  Also CONFIG_NET_NOINTS is set so that interrupt level provessing is avoided

SAMV7 USB: Move clock initialization back to sam_clockconfig.c; add seperate UTMI register definition header file; fix a couple of typo bugs