Mainly adding missing headers, removing redundant headers that
induce undefined symbols or rearranging existing headers
according to dependencies betheen them.
Also add missing include paths to makefiles and make configs.

Note: direct inclusion of pthread.h in disk.h is caused by the
latter being used almost everywhere, including third_party libraries.
Putting pthread.h there releases us from affecting more code.

Basically fixes build for anything that is not default HiSi
configuration.
Signed-off-by: NZbigniew Bodek <zbigniew.bodek@huawei.com>
Change-Id: Icdcb0874d9fed34d01fa282d33bd2e041c2ac436

Allows to disable NET_LWIP_SACK in the kernel configuration.
Signed-off-by: NZbigniew Bodek <zbigniew.bodek@huawei.com>
Change-Id: Ibcde4a811e67d61bc713d405414c4991cbc1bdd3

Fix unused function warning treated as error
when KERNEL_DYNLOAD option is switched off.
Signed-off-by: NZbigniew Bodek <zbigniew.bodek@huawei.com>
Change-Id: I21a01ff3d7ecb7b2e65bacbaa985c6390f5e4be7

Reviewed-by:liulei, lihao, likailong

Change-Id: Ibacdda2ccbbc991ac9732f2ad09bdb98195203b3

Change-Id: Ia6c1f6302407a707b3ec9b805f4c92d8a7970b86