- winddk.h: Don't define NTSYSAPI and NTSYSCALLAPI -- this is defined in ntdef.h...

- winddk.h: Don't define NTSYSAPI and NTSYSCALLAPI -- this is defined in ntdef.h. Use NTSYSAPI for HalDispatchTable instead of DECLSPEC_IMPORT (see below).
- wdm.h: Properly define NTKERNELAPI.
- ntifs.h: Properly define NTKERNELAPI, and don't redefine NTSYSAPI.
- ntoskrnl: Apply the WDK hack for our headers (and gcc) too. Also redefine NTHALAPI for NDK so we don't auto-import KdComPortInUse -- ld complains about this.
- Apply this for cmlib, csq and rossym too.
- Use this in HAL too, and redefine NTSYSAPI so we don't auto import some structures from the kernel. Also, don't define __declspec(dllimport) to nothing -- this doesn't work with gcc, and doesn't seem to be necessary. I tried building HAL with the WDK and this wasn't an issue.

svn path=/trunk/; revision=42461