MdeModulePkg: Fix typos in comments and variables

- abstrated to abstracted
  - accessibla to accessible
  - addres to address
  - apropriate to appropriate
  - arry to array
  - availabe to available
  - avaliable to available
  - becasue to because
  - correponding to corresponding
  - etablished to established
  - exeuction to execution
  - extensiable to extensible
  - fileds to fields
  - loadding to loading
  - ptototypes to prototypes
  - prococol protocol
  - requried to required
  - resoruce to resource
  - runing to running
  - uild to build

Cc: Star Zeng <star.zeng@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>

MdeModulePkg/Bus/Pci/XhciDxe/UsbHcMem.c

@@ -2,7 +2,7 @@
 
   Routine procedures for memory allocate/free.
 
-Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -567,7 +567,7 @@ UsbHcFreeMem (
       Bit   = ((ToFree - Block->BufHost) / USBHC_MEM_UNIT) % 8;
 
       //
-      // reset associated bits in bit arry
+      // reset associated bits in bit array
       //
       for (Count = 0; Count < (AllocSize / USBHC_MEM_UNIT); Count++) {
         ASSERT (USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit));