hv: treewide: fix 'inline function should be declared static'

MISRAC does not allow the use of an inline function with external
linkage.

What this patch does:
- Add the static keyword for the function that is only used in the
  definition file.
- Remove the inline keyword for the function that is used in multiple
  files.

v1 -> v2:
 * Move some functions to headers as static inline function if it is
    possible

Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>

hypervisor/arch/x86/lapic.c

@@ -146,7 +146,7 @@ static inline uint32_t read_lapic_reg32(uint32_t offset)
 	return mmio_read32(lapic_info.xapic.vaddr + offset);
 }
 
-inline void write_lapic_reg32(uint32_t offset, uint32_t value)
+void write_lapic_reg32(uint32_t offset, uint32_t value)
 {
 	if (offset < 0x20U || offset > 0x3ffU)
 		return;