Fix the following warnings (which now cause buildd failures in Ubuntu 10.04):
pulsecore/cpu-arm.c: In function 'get_cpuinfo':
pulsecore/cpu-arm.c:70: warning: implicit declaration of function 'pa_read' [-Wimplicit-function-declaration]
pulsecore/cpu-arm.c:72: warning: implicit declaration of function 'pa_close' [-Wimplicit-function-declaration]
pulsecore/cpu-arm.c: In function 'pa_cpu_init_arm':
pulsecore/cpu-arm.c:110: warning: implicit declaration of function 'pa_split_spaces' [-Wimplicit-function-declaration]
pulsecore/cpu-arm.c:110: warning: assignment makes pointer from integer without a cast
Function `pa_split_spaces' implicitly converted to pointer at pulsecore/cpu-arm.c:110