target/ppc: IBM PPE42 exception flags and regs Introduces flags and register definitions needed for the IBM PPE42 exception model. Signed-off-by: Glenn Miles <milesg@linux.ibm.com> Reviewed-by: Chinmay Rath <rathc@linux.ibm.com> Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com> Link: https://lore.kernel.org/r/20250925201758.652077-4-milesg@linux.ibm.com Message-ID: <20250925201758.652077-4-milesg@linux.ibm.com>