e1000e: remove unnecessary check for NULL pointer

The array shadow_ram is never NULL.
Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NAaron Brown  <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/e1000e/ich8lan.c

@@ -2137,8 +2137,7 @@ static s32 e1000_read_nvm_ich8lan(struct e1000_hw *hw, u16 offset, u16 words,
 
 	ret_val = 0;
 	for (i = 0; i < words; i++) {
-		if ((dev_spec->shadow_ram) &&
-		    (dev_spec->shadow_ram[offset+i].modified)) {
+		if (dev_spec->shadow_ram[offset+i].modified) {
 			data[i] = dev_spec->shadow_ram[offset+i].value;
 		} else {
 			ret_val = e1000_read_flash_word_ich8lan(hw,