[PATCH 3/4] ARM: imx: imx31: Introduce and use UART_BASE_ADDR(n)

[sbabic at denx.de]

> Introduce helper macro UART_BASE_ADDR(n), which returns Nth UART base
> address. Convert all board configurations to this new macro. This is the
> first step toward switching CONFIG_MXC_UART_BASE to Kconfig. This is a
> clean up, no functional change.
> The new macro contains compile-time test to verify N is in suitable
> range. The test works such that it multiplies constant N by constant
> double-negation of size of a non-empty structure, i.e. it multiplies
> constant N by constant 1 in each successful compilation case.
> The non-empty structure may contain C11 _Static_assert(), make use of
> this and place the kernel variant of static assert in there, so that
> it performs the compile-time check for N in the correct range. Note
> that it is not possible to directly use static_assert in compound
> statements, hence this convoluted construct.
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Fabio Estevam <festevam at denx.de>
> Cc: Peng Fan <peng.fan at nxp.com>
> Cc: Stefano Babic <sbabic at denx.de>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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