nvidia: Enable MSI (Message Signaled Interrupts)

Only tested on ATV1, don't just enable it on other platforms without testing with known hardware.
Merge pull request #2002 from dagwieers/nvidia-msi

nvidia: Enable MSI (Message Signaled Interrupts)
new package: added package 'smem'

smem is a tool that can give numerous reports on memory usage on Linux systems. Unlike existing tools, smem can report proportional set size (PSS), which is a more meaningful representation of the amount of memory used by libraries and applications in a virtual memory system.

Signed-off-by: Stephan Raue <stephan@openelec.tv>
new package: added package 'iftop'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
iftop: fix build

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libpcap: dont build shared library

Signed-off-by: Stephan Raue <stephan@openelec.tv>
new package: add package 'wireless_tools'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
new package: add package 'popt'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
new package: add package 'slang'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
new package: add package 'newt'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
linux: build and install 'perf' on development builds

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge remote-tracking branch 'upstream/master' into openelec-settings