UPSTREAM: include: Add a variadic macro to call a callback for all arguments

Add a header variadic-macro.h which defines the CALL_MACRO_FOR_EACH marco.

This macro can be used as follows:
#define

UPSTREAM: include: Add a variadic macro to call a callback for all arguments

Add a header variadic-macro.h which defines the CALL_MACRO_FOR_EACH marco.

This macro can be used as follows:
#define TEST(x)
CALL_MACRO_FOR_EACH(TEST, a, b, c, d)

This will expand to
TEST(a) TEST(b) TEST(c) TEST(d)

The nice thing is that CALL_MACRO_FOR_EACH is a variadic macro, thus the
number of arguments can vary (although it has an upper limit - in this
implementation 32 arguments).

Change-Id: Ic186ed444a78a86a4cfa10f9ca1198c0bfa9af10
Signed-off-by: Marek Behun <marek.behun@nic.cz>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
(cherry picked from commit 59981e6a3d6074bf5413c1875a95325a4b8c01ca)

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