perf: RISC-V: Remove non-kernel-doc ** comments

This will presumably trip up some tools that try to parse the comments
as kernel doc when they're not.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 4905ec2f ("RISC-V: Add sscofpmf extension support")
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

--

These recently landed in for-next, but I'm trying to avoid rewriting
history as there's a lot in flight right now.
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20220322220147.11407-1-palmer@rivosinc.comSigned-off-by: Will Deacon <will@kernel.org>

drivers/perf/riscv_pmu_sbi.c

@@ -35,7 +35,7 @@ union sbi_pmu_ctr_info {
 	};
 };
 
-/**
+/*
  * RISC-V doesn't have hetergenous harts yet. This need to be part of
  * per_cpu in case of harts with different pmu counters
  */
@@ -477,7 +477,7 @@ static int pmu_sbi_get_ctrinfo(int nctr)
 
 static inline void pmu_sbi_stop_all(struct riscv_pmu *pmu)
 {
-	/**
+	/*
 	 * No need to check the error because we are disabling all the counters
 	 * which may include counters that are not enabled yet.
 	 */
@@ -494,7 +494,7 @@ static inline void pmu_sbi_stop_hw_ctrs(struct riscv_pmu *pmu)
 		  cpu_hw_evt->used_hw_ctrs[0], 0, 0, 0, 0);
 }
 
-/**
+/*
  * This function starts all the used counters in two step approach.
  * Any counter that did not overflow can be start in a single step
  * while the overflowed counters need to be started with updated initialization
@@ -563,7 +563,7 @@ static irqreturn_t pmu_sbi_ovf_handler(int irq, void *dev)
 	/* Overflow status register should only be read after counter are stopped */
 	overflow = csr_read(CSR_SSCOUNTOVF);
 
-	/**
+	/*
 	 * Overflow interrupt pending bit should only be cleared after stopping
 	 * all the counters to avoid any race condition.
 	 */