Revert "Kernel build: enter exception save sp_sl0,exit exception restroe sp_el0"

This reverts commit 52a4fb6.

Author: xiaoxiang781216

arch/arm64/src/common/arm64_vector_table.S

@@ -78,10 +78,6 @@
 #endif
     stp    x0, x1,  [sp, #8 * REG_ELR]
 
-    mrs    x0, sp_el0
-    mrs    x1, tpidrro_el0
-    stp    x0, x1,  [sp, #8 * REG_SP_EL0]
-
     /* Increment exception depth */
 
     mrs    x0, tpidrro_el0
@@ -266,10 +262,6 @@ SECTION_FUNC(text, arm64_exit_exception)
     msr    spsr_el1,  x1
 #endif
 
-    ldp    x0, x1,   [sp, #8 * REG_SP_EL0]
-    msr    sp_el0,   x0
-    msr    tpidrro_el0,  x1
-
     /* decrement exception depth */
 
     mrs    x0, tpidrro_el0