gethostbyname() and gethostbyname_r() should be built even if there is no host file support.  From Sebastien Lorquet

Move definition of h_errno from lib_parsehostfile.c to lib_netdb.  h_errno should still be defined even if there is no host file support.  From  Sebastien Lorquet.

-Extend frequency range options to 180 MHz for STM32 ETH_MACMIIA_CR
-Fix a typo in a frequency range option in LPC43
-Only configure the PPS GPIO if the PTP protocol is enabled

From Sebastien Lorquet

Add CONFIG_NETDEV_LATEINIT that can be used to suppress calls to up_netinitialize() from early initialization

Another CAN driver fix:  From inspection, it appears that RTR counter was not being handled correctly

More CAN driver fixes: remove and unused semaphore.  Looks to me that waiter counts are not being initialized

Another oops.  I introduced a but in a previous commit.  The CAN read method nees to return an error if sem_wait() fails for any reason

STM32:  Move STM32F42xxx IRQ definitions out of stm32f40xxx_irq.h into their own stm32f42xxx_irq.h header file

STM32:  Move STM32F42xxx vector definitions out of stm32f40xxx_vector.h into their own stm32f42xxx_vector.h header file

STM32:  Move STM32F42xxx SYSCFG definitions out of stm32f40xxx_syscfg.h into their own stm32f42xxx_syscfg.h header file

STM32:  Move STM32F42xxx RCC definitions out of stm32f40xxx_rcc.h into their own stm32f42xxx_rcc.h header file

STM32:  Move STM32F42xxx DMA definitions out of stm32f40xxx_dma.h into their own stm32f42xxx_dma.h header file

STM32:  Move STM32F42xxx pinmap definitions out of stm32f40xxx_pinmap.h into their own stm32f42xxx pinmap.h header file