hexagon: delete __cpuinit usage from all hexagon files

The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications.  For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.

After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out.  Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.

Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit  -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings.  In any case, they are temporary and harmless.

This removes all the arch/hexagon uses of the __cpuinit macros from
all C files.  Currently hexagon does not have any __CPUINIT used in
assembly files.

[1] https://lkml.org/lkml/2013/5/20/589

Cc: Richard Kuo <rkuo@codeaurora.org>
Acked-by: Richard Kuo <rkuo@codeaurora.org>
Cc: linux-hexagon@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

arch/hexagon/kernel/setup.c

@@ -41,7 +41,7 @@ static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
 
 int on_simulator;
 
-void __cpuinit calibrate_delay(void)
+void calibrate_delay(void)
 {
 	loops_per_jiffy = thread_freq_mhz * 1000000 / HZ;
 }

arch/hexagon/kernel/smp.c

@@ -146,7 +146,7 @@ void __init smp_prepare_boot_cpu(void)
  * to point to current thread info
  */
 
-void __cpuinit start_secondary(void)
+void start_secondary(void)
 {
 	unsigned int cpu;
 	unsigned long thread_ptr;
@@ -194,7 +194,7 @@ void __cpuinit start_secondary(void)
  * maintains control until "cpu_online(cpu)" is set.
  */
 
-int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
+int __cpu_up(unsigned int cpu, struct task_struct *idle)
 {
 	struct thread_info *thread = (struct thread_info *)idle->stack;
 	void *stack_start;