Avoid pointless ifdef for iOS inside code not compiled for iOS anyway

The whole of svpbmp.cxx and svpvd.cxx are nowadays ifdeffed out for iOS.

Change-Id: Iac1f66457dc315ea86f86d12e1f6eb5bf4bcbb8c

vcl/headless/svpbmp.cxx

@@ -53,7 +53,7 @@ bool SvpSalBitmap::Create( const Size& rSize,
         case 16: nFormat = FORMAT_SIXTEEN_BIT_LSB_TC_MASK; break;
 #endif
         case 24: nFormat = FORMAT_TWENTYFOUR_BIT_TC_MASK; break;
-#if defined(ANDROID) || defined(IOS)
+#ifdef ANDROID
         case 32: nFormat = FORMAT_THIRTYTWO_BIT_TC_MASK_RGBA; break;
 #else
         case 32: nFormat = FORMAT_THIRTYTWO_BIT_TC_MASK_BGRA; break;

vcl/headless/svpvd.cxx

@@ -81,7 +81,7 @@ bool SvpSalVirtualDevice::SetSizeUsingBuffer( long nNewDX, long nNewDY, const ba
 #endif
             case 24: nFormat = FORMAT_TWENTYFOUR_BIT_TC_MASK; break;
             case 32: nFormat = FORMAT_THIRTYTWO_BIT_TC_MASK_BGRA; break;
-#if defined(ANDROID) || defined(IOS)
+#ifdef ANDROID
             case 0:  nFormat = FORMAT_THIRTYTWO_BIT_TC_MASK_RGBA; break;
 #else
             case 0:  nFormat = FORMAT_TWENTYFOUR_BIT_TC_MASK; break;