HV:treewide:rename struct key_info, pir_desc, map_params

For data structure types "struct key_info, struct pir_desc,
struct map_params", its name is identical with variable name
in the same scope. This MISRA C  violation is detected by
static analysis tool.
Naming convention rule:If the data structure type is used by only one
module and its name meaning is simplistic, its name needs prefix
shorten module name.

The following udpates are made:
struct key_info-->struct trusty_key_info
struct pir_desc-->struct vlapic_pir_desc
struct map_params-->struct mem_map_params

Signed-off-by: Xiangyang Wu <xiangyang.wu@linux.intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>

hypervisor/arch/x86/cpu.c

@@ -375,7 +375,7 @@ void bsp_boot_init(void)
 	*  is matching the actual offset!
 	*/
 	ASSERT((sizeof(struct trusty_startup_param)
-			+ sizeof(struct key_info)) < 0x1000U,
+			+ sizeof(struct trusty_key_info)) < 0x1000U,
 		"trusty_startup_param + key_info > 1Page size(4KB)!");
 
 	ASSERT(NR_WORLD == 2, "Only 2 Worlds supported!");