parisc: Build kernel without -ffunction-sections

As suggested by Nick Piggin it seems we can drop the -ffunction-sections
compile flag, now that the kernel uses thin archives. Testing with 32-
and 64-bit kernel showed no difference in kernel size.
Suggested-by: NNicholas Piggin <npiggin@gmail.com>
Signed-off-by: NHelge Deller <deller@gmx.de>

arch/parisc/Makefile

@@ -65,10 +65,6 @@ endif
 # kernel.
 cflags-y	+= -mdisable-fpregs
 
-# Without this, "ld -r" results in .text sections that are too big
-# (> 0x40000) for branches to reach stubs.
-cflags-y	+= -ffunction-sections
-
 # Use long jumps instead of long branches (needed if your linker fails to
 # link a too big vmlinux executable). Not enabled for building modules.
 ifdef CONFIG_MLONGCALLS