perf: arm_spe: include linux/vmalloc.h for vmap()

On linux-next, I get a build failure in some configurations:

drivers/perf/arm_spe_pmu.c: In function 'arm_spe_pmu_setup_aux':
drivers/perf/arm_spe_pmu.c:857:14: error: implicit declaration of function 'vmap'; did you mean 'swap'? [-Werror=implicit-function-declaration]
  buf->base = vmap(pglist, nr_pages, VM_MAP, PAGE_KERNEL);
              ^~~~
              swap
drivers/perf/arm_spe_pmu.c:857:37: error: 'VM_MAP' undeclared (first use in this function); did you mean 'VM_MPX'?
  buf->base = vmap(pglist, nr_pages, VM_MAP, PAGE_KERNEL);
                                     ^~~~~~
                                     VM_MPX
drivers/perf/arm_spe_pmu.c:857:37: note: each undeclared identifier is reported only once for each function it appears in
drivers/perf/arm_spe_pmu.c: In function 'arm_spe_pmu_free_aux':
drivers/perf/arm_spe_pmu.c:878:2: error: implicit declaration of function 'vunmap'; did you mean 'iounmap'? [-Werror=implicit-function-declaration]

vmap() is declared in linux/vmalloc.h, so we should include that header file.
Acked-by: NMark Rutland <mark.rutland@arm.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
[will: add additional missing #includes reported by Mark]
Signed-off-by: NWill Deacon <will.deacon@arm.com>

drivers/perf/arm_spe_pmu.c

@@ -23,16 +23,30 @@
 #define DRVNAME					PMUNAME "_pmu"
 #define pr_fmt(fmt)				DRVNAME ": " fmt
 
+#include <linux/bitops.h>
+#include <linux/bug.h>
+#include <linux/capability.h>
 #include <linux/cpuhotplug.h>
+#include <linux/cpumask.h>
+#include <linux/device.h>
+#include <linux/errno.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
 #include <linux/module.h>
 #include <linux/of_address.h>
 #include <linux/of_device.h>
 #include <linux/perf_event.h>
 #include <linux/platform_device.h>
+#include <linux/printk.h>
 #include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/vmalloc.h>
 
+#include <asm/barrier.h>
+#include <asm/cpufeature.h>
+#include <asm/mmu.h>
 #include <asm/sysreg.h>
 
 #define ARM_SPE_BUF_PAD_BYTE			0