treewide: move CONFIG_PHYS_64BIT to Kconfig

We need to ensure that CONFIG_PHYS_64BIT is configured via Kconfig so
that it is always available to the build system.  Otherwise we can run
into cases where we have inconsistent sizes of certain attributes.

Ravi Babu reported offset mismatch of struct dwc3 across files since
commit 95ebc253e6d4 ("types.h: move and redefine resource_size_t").
Since the commit, resource_addr_t points to phys_addr_t, whose size
is dependent on CONFIG_PHYS_64BIT for ARM architecture.

I tried my best to use "select" where possible (for example, ARMv8
architecture) because I think this kind of option is generally user-
unconfigurable.  However, I see some of PowerPC boards have 36BIT
defconfigs as well as 32BIT ones.  I moved CONFIG_PHYS_64BIT to the
defconfigs for such boards.

CONFIG_36BIT is no longer referenced, so all of the defines were
removed from CONFIG_SYS_EXTRA_OPTIONS.

Fixes: 95ebc253e6d4 ("types.h: move and redefine resource_size_t")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reported-by: Ravi Babu <ravibabu@ti.com>
Acked-by: Stefan Roese <sr@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a0a866e..29c54e5 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -6,6 +6,7 @@
 
 config ARM64
 	bool
+	select PHYS_64BIT
 
 config DMA_ADDR_T_64BIT
 	bool