hardware.h is only defining macros which are "wrappers" around writel().

writel() is however not available in hardware.h, <asm/io.h> needs to be
included. This means in order to use the wrappers in hardware.h, one
also needs to include the <asm/io.h> header.

However, this cannot be done currently because hardware.h is included in
include/configs files, which are implicitly included by every code file
by default, which makes the compilation of arch/arm/cpu/armv8/u-boot.lds
fail because ALIGN (the ARM assembly directive) got redefined by some
of the include files coming from <asm.io.h>.

Because nothing in the include/configs file actually use hardware.h,
let's remove the inclusion of hardware.h from the include/configs files
and explicitly add it wherever it is required.

This prepares for the next commit where <asm/io.h> will be included in
hardware.h.

Cc: Quentin Schulz <foss+uboot@0leil.net>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>