PPC32: export open/read/lseek/close for the sake of ALSA modules.

arch/ppc/kernel/ppc_ksyms.c

@@ -30,6 +30,8 @@
 #include <linux/pmu.h>
 #include <asm/prom.h>
 #include <asm/system.h>
+#define __KERNEL_SYSCALLS__
+#include <asm/unistd.h>
 #include <asm/pci-bridge.h>
 #include <asm/irq.h>
 #include <asm/pmac_feature.h>
@@ -180,6 +182,10 @@ EXPORT_SYMBOL(consistent_free);
 EXPORT_SYMBOL(consistent_sync);
 #endif
 
+EXPORT_SYMBOL(open);
+EXPORT_SYMBOL(read);
+EXPORT_SYMBOL(lseek);
+EXPORT_SYMBOL(close);
 EXPORT_SYMBOL(start_thread);
 EXPORT_SYMBOL(kernel_thread);