[PATCH] xen/arm: Fix compilation error when early printk is enabled

[Michal Orzel <michal.orzel@xxxxxxx>]

Fix compilation error when enabling early printk, introduced
by commit aa4b9d1ee6538b5cbe218d4d3fcdf9548130a063:
```
debug.S: Assembler messages:
debug.S:31: Error: constant expression expected at operand 2 -- `ldr 
x15,=((0x00400000+(0)*PAGE_SIZE)+(0x1c090000&~PAGE_MASK))`
debug.S:38: Error: constant expression expected at operand 2 -- `ldr 
x15,=((0x00400000+(0)*PAGE_SIZE)+(0x1c090000&~PAGE_MASK))`
```

The fix is to include header <xen/page-size.h> which now contains
definitions for page/size/mask etc.

Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
---
 xen/include/asm-arm/early_printk.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/include/asm-arm/early_printk.h 
b/xen/include/asm-arm/early_printk.h
index d5485decfa..8dc911cf48 100644
--- a/xen/include/asm-arm/early_printk.h
+++ b/xen/include/asm-arm/early_printk.h
@@ -10,6 +10,7 @@
 #ifndef __ARM_EARLY_PRINTK_H__
 #define __ARM_EARLY_PRINTK_H__
 
+#include <xen/page-size.h>
 
 #ifdef CONFIG_EARLY_PRINTK
 
-- 
2.29.0