misc: Fix issues flagged by gcc 6

A few warnings (and thus errors) pop up after being added to -Wall:

1. -Wmisleading-indentation

In the auto-generated code there were instances of if/else blocks that
were not indented to gcc's liking. This is addressed by adding braces.

2. -Wshift-negative-value

gcc is clever enougn to consider ~0 a negative constant, and
rightfully complains. This is addressed by using mask() which
explicitly casts to unsigned before shifting.

That is all. Porting done.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mem/ruby/system/DMASequencer.cc b/src/mem/ruby/system/DMASequencer.cc
index 6e708a927..3b0304158 100644
--- a/src/mem/ruby/system/DMASequencer.cc
+++ b/src/mem/ruby/system/DMASequencer.cc
@@ -45,7 +45,7 @@ DMASequencer::init()
 {
     RubyPort::init();
     m_is_busy = false;
-    m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits());
+    m_data_block_mask = mask(RubySystem::getBlockSizeBits());
 
     for (const auto &s_port : slave_ports)
         s_port->sendRangeChange();